Building a strong IELTS score takes more than memorising a few impressive words. It requires vocabulary that is accurate, flexible, and natural enough to use in both Writing and Speaking without sounding forced. That is exactly what this page offers: 282 Advanced IELTS Vocabulary Words (C1–C2), carefully selected to help learners move beyond ordinary language and start expressing ideas with greater precision and confidence. Each word has been presented with its meaning, synonyms, antonyms, an example sentence, an IELTS Writing sample sentence, and an IELTS Speaking sample sentence, so you can learn not only what the word means, but also how to use it correctly in real exam situations. You can also download the free PDF book, which is available at the end of this page.

282 Advanced IELTS Vocabulary Words (C1–C2) for Writing and Speaking

For IELTS candidates aiming for Band 7, 8 or above, vocabulary plays a major role in creating a strong impression. Examiners look for words that are varied, relevant, and used appropriately, not just difficult terms used for show. That is why this premium lexical resource has been designed with practical learning in mind. The vocabulary here is advanced, but still useful, teachable, and easy to apply in everyday IELTS practice. Whether you are writing essays, describing charts, answering cue cards, or discussing abstract topics, these C1–C2 words will help you sound more polished, more fluent, and more confident from the first sentence to the last.

Table of Contents

• A
• B
• C
• D
• E
• F
• G
• H
• I
• J
• K
• L
• M
• N
• O
• P
• Q
• R
• S
• T
• U
• V
• W
• Z

A

1. aberration (C2)

Synonyms: anomaly, deviation, irregularity
Antonyms: normality, conformity
Example: The sudden drop in temperatures was an aberration in the otherwise mild winter.
IELTS Writing: The data shows a clear aberration from the long‑term climate trend, which requires further investigation.
IELTS Speaking: “Honestly, that outburst was an aberration – he’s usually very calm.”

2. accolade (C1)

Synonyms: tribute, honour, praise
Antonyms: criticism, condemnation
Example: Winning the international design award was the highest accolade of her career.
IELTS Writing: Such accolades reflect not only individual talent but also institutional support.
IELTS Speaking: “The best accolade I ever received was a simple ‘thank you’ from a patient.”

3. acquiesce (C1)

Synonyms: comply, consent, assent
Antonyms: resist, protest, defy
Example: After lengthy negotiations, the committee finally acquiesced to the proposed changes.
IELTS Writing: Governments often acquiesce to public pressure when elections are imminent.
IELTS Speaking: “I didn’t want to go, but I acquiesced because everyone else was so keen.”

4. adamant (C1)

Synonyms: unyielding, resolute, steadfast
Antonyms: flexible, indecisive, wavering
Example: She remained adamant that the project deadline could not be extended.
IELTS Writing: The board was adamant about maintaining ethical standards despite commercial pressures.
IELTS Speaking: “My parents were adamant that I should finish university before travelling.”

5. adept (C1)

Synonyms: skilled, proficient, accomplished
Antonyms: inept, clumsy, incompetent
Example: He is remarkably adept at turning complex data into compelling visual stories.
IELTS Writing: Students must become adept at evaluating sources in the digital age.
IELTS Speaking: “I’m fairly adept at cooking, but baking is still a challenge.”

6. aesthetic (C1)

Synonyms: artistic, visual, tasteful
Antonyms: ugly, unattractive, unappealing
Example: The minimalist aesthetic of the new library promotes a calm, focused atmosphere.
IELTS Writing: Urban planners often prioritise aesthetic considerations alongside functionality.
IELTS Speaking: “I love the aesthetic of old bookshops – they feel so cosy.”

7. affable (C1)

Synonyms: friendly, genial, amiable
Antonyms: unfriendly, surly, aloof
Example: The hotel manager was so affable that guests often returned just to chat with him.
IELTS Writing: An affable leader can significantly improve workplace morale.
IELTS Speaking: “My neighbour is incredibly affable; we have coffee together every week.”

8. alacrity (C2)

Synonyms: eagerness, willingness, enthusiasm
Antonyms: reluctance, hesitance, apathy
Example: She accepted the job offer with alacrity, having admired the company for years.
IELTS Writing: Young volunteers often tackle environmental projects with remarkable alacrity.
IELTS Speaking: “When they asked for help, I agreed with alacrity – it sounded like fun.”

9. altruistic (C1)

Synonyms: selfless, benevolent, humanitarian
Antonyms: selfish, egoistic, self‑centred
Example: His decision to donate a kidney to a stranger was a truly altruistic act.
IELTS Writing: Altruistic behaviour strengthens social bonds and community resilience.
IELTS Speaking: “I don’t think it’s purely altruistic; volunteering makes me happy too.”

10. ambiguous (C1)

Synonyms: vague, unclear, equivocal
Antonyms: clear, explicit, unambiguous
Example: The wording of the contract was deliberately ambiguous, leading to disputes later.
IELTS Writing: Politicians often exploit ambiguous language to avoid firm commitments.
IELTS Speaking: “His reply was so ambiguous I couldn’t tell if he actually agreed.”

11. ameliorate (C2)

Synonyms: improve, alleviate, mitigate
Antonyms: worsen, aggravate, exacerbate
Example: The new traffic system should ameliorate congestion during peak hours.
IELTS Writing: Social welfare policies are designed to ameliorate the effects of poverty.
IELTS Speaking: “A short walk in the park can really ameliorate a bad mood.”

12. anachronistic (C2)

Synonyms: outdated, obsolete, old‑fashioned
Antonyms: modern, contemporary, current
Example: The idea that women should not work is considered deeply anachronistic in most societies.
IELTS Writing: Such anachronistic legislation fails to reflect modern values.
IELTS Speaking: “Paying by cheque feels so anachronistic these days.”

13. anomaly (C2)

Synonyms: irregularity, oddity, exception
Antonyms: norm, standard, regularity
Example: The unusually high sales figure was treated as a statistical anomaly.
IELTS Writing: The researcher dismissed the outlier as a mere anomaly rather than a trend.
IELTS Speaking: “That cold day in July was definitely an anomaly.”

14. antipathy (C2)

Synonyms: aversion, hostility, dislike
Antonyms: affection, sympathy, fondness
Example: There is a deep‑rooted antipathy between the two rival political factions.
IELTS Writing: Public antipathy towards corruption can drive electoral change.
IELTS Speaking: “I have no antipathy towards him; we just have different tastes.”

15. apathetic (C2)

Synonyms: indifferent, uninterested, unmotivated
Antonyms: enthusiastic, passionate, concerned
Example: Voter turnout was low because many citizens felt apathetic about the candidates.
IELTS Writing: An apathetic electorate undermines the health of a democracy.
IELTS Speaking: “I was surprisingly apathetic about the result – I didn’t mind who won.”

B

16. benevolent (C1)

Synonyms: kind, generous, charitable
Antonyms: malevolent, cruel, selfish
Example: The benevolent old gentleman funded scholarships for dozens of underprivileged students.
IELTS Writing: A benevolent dictator might improve living standards, but at the cost of freedom.
IELTS Speaking: “My boss is quite benevolent; she always gives us extra days off.”

17. bolster (C1)

Synonyms: strengthen, reinforce, support
Antonyms: weaken, undermine, diminish
Example: The central bank lowered interest rates to bolster the struggling economy.
IELTS Writing: Mentorship programmes can bolster new teachers’ confidence.
IELTS Speaking: “I listened to some upbeat music to bolster my mood before the exam.”

18. brevity (C1)

Synonyms: conciseness, shortness, succinctness
Antonyms: lengthiness, verbosity, long‑windedness
Example: The speaker admired the brevity of the poem, which said so much in so few words.
IELTS Writing: For the sake of brevity, I will focus on only three main arguments.
IELTS Speaking: “I appreciated the brevity of the speech – 10 minutes and straight to the point.”

19. bombastic (C2)

Synonyms: pompous, grandiose, overblown
Antonyms: humble, restrained, understated
Example: His bombastic claims of changing the world sounded hollow without a concrete plan.
IELTS Writing: Bombastic rhetoric often masks a lack of substantive policy.
IELTS Speaking: “I found the presenter a bit too bombastic; he just kept praising himself.”

20. burgeon (C1)

Synonyms: flourish, expand, proliferate
Antonyms: shrink, dwindle, decline
Example: The tech start‑up scene continues to burgeon in the capital city.
IELTS Writing: Renewable energy industries are burgeoning worldwide.
IELTS Speaking: “Online learning is really burgeoning – everyone I know is taking a course.”

21. benign (C1)

Synonyms: harmless, gentle, favourable
Antonyms: malignant, harmful, hostile
Example: Fortunately, the tumour was benign and required no further treatment.
IELTS Writing: Globalisation can have benign effects if properly regulated.
IELTS Speaking: “The weather was benign – sunny but not too hot.”

22. belligerent (C2)

Synonyms: aggressive, combative, hostile
Antonyms: peaceful, friendly, conciliatory
Example: His belligerent tone during the debate alienated many potential supporters.
IELTS Writing: Belligerent foreign policy often provokes unnecessary conflict.
IELTS Speaking: “After a few drinks he becomes quite belligerent, so I avoid him at parties.”

23. blight (C1)

Synonyms: spoil, ruin, mar
Antonyms: enhance, improve, beautify
Example: Poor urban planning can blight a neighbourhood for generations.
IELTS Writing: Corruption continues to blight the country’s economic prospects.
IELTS Speaking: “Litter really blights the beauty of our local park.”

C

24. candid (C1)

Synonyms: frank, honest, open
Antonyms: evasive, guarded, secretive
Example: She gave a remarkably candid interview about her struggles with mental health.
IELTS Writing: To make progress, we need a candid assessment of the current failings.
IELTS Speaking: “To be candid, I didn’t really enjoy the film.”

25. capricious (C2)

Synonyms: unpredictable, fickle, whimsical
Antonyms: steady, consistent, predictable
Example: The stock market can be notoriously capricious in times of political uncertainty.
IELTS Writing: Capricious weather patterns pose a threat to small‑scale farmers.
IELTS Speaking: “Her taste in music is capricious – one day jazz, the next heavy metal.”

26. catalyst (C1)

Synonyms: spur, trigger, stimulus
Antonyms: hindrance, deterrent, block
Example: The protest served as a catalyst for sweeping educational reforms.
IELTS Writing: Technological innovation is often the catalyst for societal change.
IELTS Speaking: “Travelling alone was the catalyst for my decision to become a writer.”

27. circumspect (C2)

Synonyms: cautious, prudent, wary
Antonyms: reckless, careless, heedless
Example: Investors are more circumspect now after last year’s market crash.
IELTS Writing: A circumspect approach to genetic engineering is advisable.
IELTS Speaking: “I’m a bit circumspect about sharing personal details online.”

28. clandestine (C2)

Synonyms: secret, covert, surreptitious
Antonyms: open, overt, above‑board
Example: The spy entered the building in a clandestine operation at midnight.
IELTS Writing: Clandestine surveillance programmes erode public trust in government.
IELTS Speaking: “They had a clandestine meeting in a quiet café to avoid attention.”

29. coerce (C1)

Synonyms: force, pressure, compel
Antonyms: persuade, coax, encourage
Example: No one should be coerced into signing a contract they do not understand.
IELTS Writing: Dictatorships often coerce citizens into displaying fake loyalty.
IELTS Speaking: “My friends coerced me into doing a karaoke solo – I was terrified.”

30. cogent (C2)

Synonyms: convincing, compelling, logical
Antonyms: weak, unconvincing, illogical
Example: Her essay presented a cogent argument for reducing the voting age.
IELTS Writing: The most successful essays are built around cogent reasoning.
IELTS Speaking: “That’s a cogent point – I hadn’t thought of it that way.”

31. commensurate (C2)

Synonyms: proportionate, corresponding, equivalent
Antonyms: disproportionate, inadequate, unequal
Example: The salary was commensurate with her extensive experience in the field.
IELTS Writing: Punishments must be commensurate with the severity of the crime.
IELTS Speaking: “I hope the rewards are commensurate with the effort I’m putting in.”

32. complacent (C1)

Synonyms: smug, self‑satisfied, unconcerned
Antonyms: vigilant, discontented, driven
Example: The team became complacent after winning five matches in a row.
IELTS Writing: Complacent attitudes towards climate change could have catastrophic consequences.
IELTS Speaking: “I got a bit complacent with my fitness routine over the holidays.”

33. conciliatory (C2)

Synonyms: appeasing, pacifying, peacemaking
Antonyms: confrontational, provocative, antagonistic
Example: The prime minister made a conciliatory speech aimed at uniting the divided parliament.
IELTS Writing: A conciliatory tone is essential during diplomatic negotiations.
IELTS Speaking: “I tried to be conciliatory, but he just wouldn’t listen.”

34. concur (C1)

Synonyms: agree, consent, assent
Antonyms: disagree, dissent, oppose
Example: I wholeheartedly concur with the committee’s recommendation.
IELTS Writing: Most researchers concur that prevention is better than cure.
IELTS Speaking: “I concur completely – that restaurant is vastly overrated.”

35. condone (C1)

Synonyms: tolerate, overlook, approve
Antonyms: condemn, denounce, censure
Example: A teacher must never condone bullying in any form.
IELTS Writing: By failing to act, the government effectively condones the illegal logging.
IELTS Speaking: “I don’t condone lying, but I understand why she did it.”

36. conjecture (C1)

Synonyms: speculation, guesswork, supposition
Antonyms: fact, certainty, proof
Example: Without solid evidence, the whole theory remains mere conjecture.
IELTS Writing: The report is based on conjecture rather than empirical data.
IELTS Speaking: “It’s all conjecture at this stage – nobody really knows what will happen.”

37. conscientious (C1)

Synonyms: diligent, meticulous, thorough
Antonyms: careless, negligent, sloppy
Example: She is a conscientious editor who checks every footnote twice.
IELTS Writing: Conscientious citizens recycle and reduce their plastic consumption.
IELTS Speaking: “He’s so conscientious – he never misses a deadline.”

38. conspicuous (C1)

Synonyms: noticeable, obvious, prominent
Antonyms: inconspicuous, hidden, subtle
Example: Her bright red coat made her conspicuous in the grey city crowd.
IELTS Writing: The conspicuous absence of female leaders in the sector is alarming.
IELTS Speaking: “It was a bit too conspicuous – I felt everyone was staring.”

39. contrite (C2)

Synonyms: remorseful, repentant, regretful
Antonyms: unrepentant, defiant, remorseless
Example: He offered a contrite apology after losing his temper in the meeting.
IELTS Writing: A contrite offender is more likely to be granted leniency.
IELTS Speaking: “I was genuinely contrite, but she still wouldn’t forgive me.”

40. conundrum (C1)

Synonyms: puzzle, dilemma, riddle
Antonyms: solution, answer, clarity
Example: The ethical conundrum left the doctors unsure of the right course of action.
IELTS Writing: Rapid urbanisation presents a conundrum for sustainable development.
IELTS Speaking: “Here’s a conundrum: should I take the well‑paid job or follow my passion?”

41. corroborate (C1)

Synonyms: confirm, verify, substantiate
Antonyms: contradict, refute, disprove
Example: The witness’s statement was corroborated by CCTV footage.
IELTS Writing: Several studies corroborate the link between exercise and mental health.
IELTS Speaking: “Can anyone corroborate your story?”

42. credulous (C2)

Synonyms: gullible, naïve, trusting
Antonyms: sceptical, suspicious, incredulous
Example: The scam targeted credulous elderly people who believed the fake prize letters.
IELTS Writing: In the era of fake news, a credulous public is easily manipulated.
IELTS Speaking: “I’m not usually credulous, but that documentary almost convinced me.”

43. cryptic (C1)

Synonyms: mysterious, puzzling, enigmatic
Antonyms: clear, straightforward, obvious
Example: His message was so cryptic that none of us could decipher it.
IELTS Writing: The company’s cryptic statement did little to reassure investors.
IELTS Speaking: “He gave a cryptic smile and didn’t explain further.”

D

44. dearth (C2)

Synonyms: shortage, lack, scarcity
Antonyms: abundance, surplus, plenty
Example: There is a dearth of qualified nurses in rural areas.
IELTS Writing: The study highlights a dearth of research on long‑term side effects.
IELTS Speaking: “There’s a real dearth of good coffee shops around here.”

45. debilitate (C2)

Synonyms: weaken, enfeeble, exhaust
Antonyms: strengthen, invigorate, energise
Example: The tropical disease can debilitate its victims for months.
IELTS Writing: Chronic underfunding has debilitated public health services.
IELTS Speaking: “Migraines completely debilitate me – I can’t do anything.”

46. decadence (C1)

Synonyms: luxury, indulgence, excess
Antonyms: modesty, simplicity, austerity
Example: The palace was a symbol of the ruler’s wealth and decadence.
IELTS Writing: Critics view consumer culture as a form of modern decadence.
IELTS Speaking: “I love a bit of decadence on holiday – spa days, fine dining, the lot.”

47. deference (C1)

Synonyms: respect, esteem, reverence
Antonyms: disrespect, defiance, irreverence
Example: In many cultures, younger people show deference to their elders.
IELTS Writing: The court operated with an atmosphere of deference to judicial authority.
IELTS Speaking: “Out of deference to my colleague, I didn’t voice my disagreement.”

48. deleterious (C2)

Synonyms: harmful, damaging, detrimental
Antonyms: beneficial, advantageous, helpful
Example: The long‑term use of the pesticide has deleterious effects on bee populations.
IELTS Writing: Deleterious lifestyle habits account for a large share of preventable diseases.
IELTS Speaking: “Lack of sleep can have a deleterious impact on your grades.”

49. delineate (C2)

Synonyms: describe, outline, define
Antonyms: obscure, confuse, distort
Example: The report clearly delineates the responsibilities of each department.
IELTS Writing: The first paragraph should delineate the scope of the essay.
IELTS Speaking: “Could you delineate the main differences between the two plans?”

50. demagogue (C2)

Synonyms: rabble‑rouser, agitator, firebrand
Antonyms: peacemaker, conciliator, unifier
Example: The historian argued that the country fell victim to a charismatic demagogue.
IELTS Writing: Demagogues often exploit economic anxiety to gain power.
IELTS Speaking: “He’s not a real leader, just a demagogue who tells people what they want to hear.”

51. denigrate (C2)

Synonyms: belittle, disparage, demean
Antonyms: praise, acclaim, applaud
Example: It is unfair to denigrate an entire profession based on a few scandals.
IELTS Writing: The article denigrates traditional medicine without offering solid evidence.
IELTS Speaking: “Stop denigrating yourself – you did a fantastic job.”

52. depict (C1)

Synonyms: portray, illustrate, represent
Antonyms: misrepresent, distort, conceal
Example: The documentary aims to depict the harsh realities of factory farming.
IELTS Writing: Graphs can effectively depict complex economic trends.
IELTS Speaking: “The book depicts 19th‑century London so vividly.”

53. deplete (C1)

Synonyms: exhaust, reduce, diminish
Antonyms: replenish, restore, refill
Example: Overfishing has severely depleted the region’s tuna stocks.
IELTS Writing: If we continue to deplete natural resources, future generations will suffer.
IELTS Speaking: “My energy was completely depleted after the 12‑hour shift.”

54. deplore (C1)

Synonyms: condemn, denounce, abhor
Antonyms: applaud, praise, admire
Example: The international community has united to deplore the use of chemical weapons.
IELTS Writing: We must deplore any form of discrimination in the workplace.
IELTS Speaking: “I absolutely deplore the way they treat their animals.”

55. deride (C2)

Synonyms: mock, ridicule, scorn
Antonyms: respect, admire, praise
Example: The critics derided the film as predictable and shallow.
IELTS Writing: To deride an opponent instead of engaging with their ideas weakens one’s argument.
IELTS Speaking: “Don’t deride her for trying – at least she’s doing something.”

56. despondent (C2)

Synonyms: dejected, hopeless, disheartened
Antonyms: hopeful, cheerful, optimistic
Example: After the third job rejection, he became increasingly despondent.
IELTS Writing: Prolonged unemployment can leave individuals feeling despondent and isolated.
IELTS Speaking: “I felt despondent for a week after failing my driving test.”

57. deteriorate (C1)

Synonyms: worsen, decline, degrade
Antonyms: improve, recover, get better
Example: If the bridge is not repaired soon, its condition will deteriorate further.
IELTS Writing: Air quality in the capital continues to deteriorate due to traffic emissions.
IELTS Speaking: “My grandmother’s health deteriorated quite quickly last year.”

58. detriment (C1)

Synonyms: harm, damage, disadvantage
Antonyms: benefit, advantage, boon
Example: He worked extremely long hours, to the detriment of his family life.
IELTS Writing: The policy favours large corporations at the detriment of small businesses.
IELTS Speaking: “I think I studied too much, to the detriment of my sleep.”

59. deviate (C1)

Synonyms: diverge, stray, depart
Antonyms: conform, stick, adhere
Example: The final cost deviated significantly from the original estimate.
IELTS Writing: Any proposal that deviates from the scientific consensus must be carefully scrutinised.
IELTS Speaking: “I try not to deviate from my study timetable.”

60. dichotomy (C2)

Synonyms: division, split, polarity
Antonyms: unity, fusion, amalgamation
Example: The simple dichotomy between good and evil rarely applies in real life.
IELTS Writing: There is a growing dichotomy between urban and rural educational opportunities.
IELTS Speaking: “I reject that false dichotomy – you can be ambitious and kind.”

E

61. ebullient (C2)

Synonyms: exuberant, enthusiastic, buoyant
Antonyms: gloomy, subdued, apathetic
Example: The crowd was ebullient after the unexpected victory.
IELTS Writing: An ebullient stock market does not always signal a healthy economy.
IELTS Speaking: “She was ebullient about her new job – it was lovely to see.”

62. eclectic (C1)

Synonyms: diverse, varied, wide‑ranging
Antonyms: uniform, homogeneous, narrow
Example: Her music taste is eclectic, ranging from classical opera to hip‑hop.
IELTS Writing: The museum’s eclectic collection attracts a broad spectrum of visitors.
IELTS Speaking: “My wardrobe is quite eclectic – I don’t follow one style.”

63. efficacious (C2)

Synonyms: effective, potent, productive
Antonyms: ineffective, useless, futile
Example: This natural remedy proved more efficacious than conventional medicine for some patients.
IELTS Writing: The most efficacious way to reduce poverty is through education.
IELTS Speaking: “Is this cream really efficacious, or is it just clever marketing?”

64. egregious (C2)

Synonyms: shocking, appalling, flagrant
Antonyms: minor, trivial, unnoticeable
Example: The accountant was jailed for an egregious fraud that cost investors millions.
IELTS Writing: The report exposes egregious human rights violations.
IELTS Speaking: “That was an egregious error – I can’t believe I missed it.”

65. elicit (C1)

Synonyms: draw out, evoke, provoke
Antonyms: suppress, repress, stifle
Example: The teacher used pictures to elicit vocabulary from the young learners.
IELTS Writing: Well‑designed surveys elicit more honest responses.
IELTS Speaking: “His speech didn’t elicit much applause – it was a bit dull.”

66. eloquent (C1)

Synonyms: articulate, expressive, fluent
Antonyms: inarticulate, halting, tongue‑tied
Example: She gave an eloquent defence of the arts in education.
IELTS Writing: An eloquent opening paragraph can captivate the examiner immediately.
IELTS Speaking: “He’s not the most eloquent speaker, but his ideas are brilliant.”

67. elucidate (C2)

Synonyms: clarify, explain, illuminate
Antonyms: confuse, obscure, mystify
Example: The professor took a moment to elucidate the more complex equation.
IELTS Writing: This essay will elucidate the causes of urban migration.
IELTS Speaking: “Could you elucidate that point? I’m not sure I follow.”

68. elusive (C1)

Synonyms: evasive, slippery, subtle
Antonyms: obvious, clear, attainable
Example: A permanent cure for the common cold remains elusive.
IELTS Writing: True happiness is often elusive in consumer‑driven societies.
IELTS Speaking: “I keep spotting a rare bird, but it’s so elusive.”

69. embellish (C1)

Synonyms: decorate, adorn, exaggerate
Antonyms: simplify, understate, strip
Example: She tends to embellish her travel stories with fantastical details.
IELTS Writing: Avoid embellishing data; present the facts as they are.
IELTS Speaking: “He embellished the story so much I didn’t believe a word.”

70. empirical (C1)

Synonyms: observational, experimental, evidence‑based
Antonyms: theoretical, speculative, abstract
Example: The theory lacks empirical support and is therefore not widely accepted.
IELTS Writing: Empirical evidence strongly suggests that early intervention works.
IELTS Speaking: “I’m more convinced by empirical results than by anecdotes.”

71. emulate (C1)

Synonyms: imitate, copy, mirror
Antonyms: ignore, disregard, differ
Example: Many start‑ups attempt to emulate the success of industry giants.
IELTS Writing: Young athletes often emulate their sporting heroes.
IELTS Speaking: “I try to emulate my older sister – she’s so disciplined.”

72. endemic (C1)

Synonyms: widespread, native, prevalent
Antonyms: alien, foreign, sporadic
Example: Corruption remains endemic in some public institutions.
IELTS Writing: The disease is endemic to tropical regions with poor sanitation.
IELTS Speaking: “Litter is endemic in our neighbourhood – it’s really frustrating.”

73. engender (C1)

Synonyms: generate, cause, provoke
Antonyms: suppress, prevent, stifle
Example: The new policy may engender resentment among lower‑paid staff.
IELTS Writing: Free education can engender a more skilled workforce.
IELTS Speaking: “His constant criticism only engendered hostility.”

74. enigma (C2)

Synonyms: mystery, puzzle, riddle
Antonyms: clarity, transparency, open book
Example: The artist remains an enigma, rarely giving interviews.
IELTS Writing: The origin of the universe is perhaps the greatest scientific enigma.
IELTS Speaking: “My grandfather was a bit of an enigma – he never spoke about his past.”

75. ephemeral (C2)

Synonyms: fleeting, transitory, short‑lived
Antonyms: permanent, lasting, enduring
Example: The beauty of cherry blossoms is ephemeral, lasting only a few days.
IELTS Writing: Social media fame is often ephemeral and difficult to sustain.
IELTS Speaking: “I try to enjoy those ephemeral moments of pure happiness.”

76. equanimity (C2)

Synonyms: composure, calmness, poise
Antonyms: anxiety, agitation, panic
Example: She handled the aggressive questioning with remarkable equanimity.
IELTS Writing: Leaders should maintain equanimity during a crisis.
IELTS Speaking: “Yoga helps me keep my equanimity when life gets stressful.”

F

77. facetious (C2)

Synonyms: flippant, joking, tongue‑in‑cheek
Antonyms: serious, earnest, solemn
Example: He made a facetious remark that offended some audience members.
IELTS Writing: A facetious tone is inappropriate in academic discourse.
IELTS Speaking: “Don’t be facetious – I’m asking a genuine question.”

78. fallacious (C2)

Synonyms: false, misleading, erroneous
Antonyms: true, valid, sound
Example: The argument is fallacious because it confuses correlation with causation.
IELTS Writing: One must avoid fallacious reasoning when constructing an argument.
IELTS Speaking: “That’s a fallacious assumption – not all rich people are greedy.”

79. fastidious (C1)

Synonyms: meticulous, fussy, particular
Antonyms: careless, sloppy, indifferent
Example: He is fastidious about his car, cleaning it every weekend without fail.
IELTS Writing: A fastidious approach to referencing prevents accusations of plagiarism.
IELTS Speaking: “I’m not that fastidious; a bit of mess doesn’t bother me.”

80. feasible (C1)

Synonyms: practicable, viable, workable
Antonyms: impractical, impossible, unworkable
Example: Solar power is now a feasible alternative to fossil fuels in many countries.
IELTS Writing: The proposal is financially feasible and environmentally sound.
IELTS Speaking: “Is it feasible to finish this project by Friday? I doubt it.”

81. fervent (C1)

Synonyms: passionate, ardent, zealous
Antonyms: indifferent, apathetic, cool
Example: She is a fervent supporter of animal rights and volunteers every weekend.
IELTS Writing: Fervent nationalism can sometimes fuel conflict.
IELTS Speaking: “I’m a fervent fan of historical dramas.”

82. flagrant (C2)

Synonyms: blatant, glaring, obvious
Antonyms: subtle, discreet, unobtrusive
Example: The referee missed a flagrant foul that should have been a red card.
IELTS Writing: Flagrant disregard for environmental laws must carry heavy penalties.
IELTS Speaking: “That’s a flagrant exaggeration – the queue wasn’t that long.”

83. flippant (C2)

Synonyms: disrespectful, cheeky, frivolous
Antonyms: respectful, serious, solemn
Example: His flippant attitude towards safety annoyed his colleagues.
IELTS Writing: A flippant remark can undermine an otherwise compelling essay.
IELTS Speaking: “Sorry if I sounded flippant – I do understand the seriousness.”

84. fluctuate (C1)

Synonyms: vary, oscillate, waver
Antonyms: stabilise, steady, remain constant
Example: Currency exchange rates tend to fluctuate during economic uncertainty.
IELTS Writing: The graph shows that temperatures fluctuated dramatically over the decade.
IELTS Speaking: “My weight fluctuates a bit during the holidays.”

85. formidable (C1)

Synonyms: daunting, intimidating, impressive
Antonyms: easy, weak, insignificant
Example: She faced formidable opposition in the final round of the tournament.
IELTS Writing: Climate change is a formidable challenge that requires global cooperation.
IELTS Speaking: “The exam was formidable, but I managed to pass.”

86. fortuitous (C2)

Synonyms: lucky, chance, accidental
Antonyms: planned, deliberate, intentional
Example: A fortuitous encounter at the airport led to a lasting business partnership.
IELTS Writing: The discovery of penicillin was largely fortuitous.
IELTS Speaking: “It was completely fortuitous – I wasn’t even looking for a job.”

87. frugal (C1)

Synonyms: thrifty, economical, sparing
Antonyms: extravagant, wasteful, spendthrift
Example: Frugal shoppers always look for discounts before making a purchase.
IELTS Writing: A frugal lifestyle can significantly reduce one’s environmental footprint.
IELTS Speaking: “I’m quite frugal – I bring my own lunch to work every day.”

G

88. garrulous (C2)

Synonyms: talkative, loquacious, chatty
Antonyms: taciturn, reticent, silent
Example: The garrulous taxi driver gave us a detailed history of the city.
IELTS Writing: A garrulous presentation can lose the audience’s attention.
IELTS Speaking: “My neighbour is extremely garrulous – a two‑minute chat lasts an hour.”

89. genial (C1)

Synonyms: friendly, cordial, amiable
Antonyms: hostile, unfriendly, cold
Example: The atmosphere in the pub was warm and genial.
IELTS Writing: A genial manager fosters a cooperative work environment.
IELTS Speaking: “He’s a genial host – everyone feels welcome at his parties.”

90. germane (C2)

Synonyms: relevant, pertinent, applicable
Antonyms: irrelevant, unrelated, extraneous
Example: Please limit your comments to matters germane to the case.
IELTS Writing: Only include details that are germane to your thesis statement.
IELTS Speaking: “That’s an interesting fact, but is it germane to our discussion?”

91. grandiose (C2)

Synonyms: extravagant, overambitious, ostentatious
Antonyms: modest, humble, realistic
Example: His grandiose plans to build a skyscraper in the village were quickly rejected.
IELTS Writing: Grandiose language can make an essay appear pretentious.
IELTS Speaking: “The wedding was a bit too grandiose for my taste.”

92. gratuitous (C1)

Synonyms: unwarranted, unnecessary, uncalled‑for
Antonyms: necessary, justified, essential
Example: The film contained gratuitous violence that added nothing to the plot.
IELTS Writing: Gratuitous jargon weakens the clarity of your writing.
IELTS Speaking: “The rude remark was completely gratuitous.”

93. gregarious (C1)

Synonyms: sociable, outgoing, convivial
Antonyms: antisocial, introverted, solitary
Example: As a gregarious person, she thrived in the busy hostel environment.
IELTS Writing: Gregarious cultures place high value on communal activities.
IELTS Speaking: “I’m not naturally gregarious, but I force myself to network.”

94. guile (C2)

Synonyms: cunning, craftiness, deceit
Antonyms: honesty, sincerity, candour
Example: He used a mixture of charm and guile to climb the corporate ladder.
IELTS Writing: The politician relied on guile rather than genuine argument.
IELTS Speaking: “There’s no guile in her – what you see is what you get.”

H

95. hackneyed (C2)

Synonyms: clichéd, overused, banal
Antonyms: original, fresh, novel
Example: The speech was full of hackneyed phrases about hope and change.
IELTS Writing: Avoid hackneyed expressions like “in a nutshell” in academic writing.
IELTS Speaking: “It’s a hackneyed plot, but the acting saves it.”

96. hamper (C1)

Synonyms: hinder, impede, obstruct
Antonyms: help, aid, facilitate
Example: Bad weather hampered the rescue efforts in the mountains.
IELTS Writing: A lack of investment hampers technological progress in rural areas.
IELTS Speaking: “My broken wrist really hampered my piano practice.”

97. haphazard (C1)

Synonyms: random, chaotic, disorganised
Antonyms: systematic, orderly, methodical
Example: The books were arranged in a haphazard pile on the floor.
IELTS Writing: Haphazard urban development leads to inefficient infrastructure.
IELTS Speaking: “I did some haphazard packing and forgot my toothbrush.”

98. harbinger (C2)

Synonyms: herald, omen, precursor
Antonyms: aftereffect, consequence
Example: The early flowers are a harbinger of spring.
IELTS Writing: Rising unemployment is often a harbinger of economic recession.
IELTS Speaking: “That first grey hair felt like a harbinger of old age!”

99. hedonistic (C2)

Synonyms: pleasure‑seeking, self‑indulgent, sybaritic
Antonyms: ascetic, self‑denying, disciplined
Example: The resort promotes a hedonistic lifestyle of spa treatments and gourmet meals.
IELTS Writing: A purely hedonistic society might neglect long‑term responsibilities.
IELTS Speaking: “My holiday was wonderfully hedonistic – I did nothing but eat and sunbathe.”

100. hegemony (C2)

Synonyms: dominance, supremacy, control
Antonyms: subordination, weakness, inferiority
Example: The country sought to maintain its cultural hegemony over the region.
IELTS Writing: The hegemony of a single language can marginalise minority cultures.
IELTS Speaking: “The company has complete hegemony over the smartphone market.”

101. hiatus (C1)

Synonyms: break, pause, gap
Antonyms: continuation, resumption, flow
Example: The band went on a two‑year hiatus before releasing their new album.
IELTS Writing: After a brief hiatus, negotiations resumed with renewed vigour.
IELTS Speaking: “I took a short hiatus from social media and felt much better.”

I

102. iconoclast (C2)

Synonyms: rebel, dissenter, nonconformist
Antonyms: conformist, traditionalist, follower
Example: The artist was an iconoclast who challenged all the conventions of her time.
IELTS Writing: Iconoclasts are often the driving force behind scientific revolutions.
IELTS Speaking: “He’s a bit of an iconoclast – always questioning authority.”

103. idiosyncratic (C2)

Synonyms: eccentric, peculiar, distinctive
Antonyms: common, ordinary, conventional
Example: His idiosyncratic teaching style, full of jokes and props, kept students engaged.
IELTS Writing: The author’s idiosyncratic vocabulary makes her work instantly recognisable.
IELTS Speaking: “I have an idiosyncratic habit of reading the last page of a book first.”

104. ignominious (C2)

Synonyms: humiliating, disgraceful, shameful
Antonyms: glorious, honourable, dignified
Example: The manager’s ignominious departure was reported on the front pages.
IELTS Writing: The treaty ended in ignominious failure for the negotiators.
IELTS Speaking: “It was a bit ignominious tripping over in front of everyone.”

105. illicit (C1)

Synonyms: illegal, unlawful, prohibited
Antonyms: legal, lawful, permitted
Example: The trade in illicit goods is harming the local economy.
IELTS Writing: Governments must tackle the illicit arms trade more aggressively.
IELTS Speaking: “They were caught with illicit substances at the border.”

106. immerse (C1)

Synonyms: submerge, plunge, absorb
Antonyms: withdraw, disengage, extract
Example: She decided to immerse herself in the local culture by living with a host family.
IELTS Writing: Students who immerse themselves in an English‑speaking environment progress faster.
IELTS Speaking: “I love to immerse myself in a good novel on a rainy day.”

107. immutable (C2)

Synonyms: unchangeable, fixed, permanent
Antonyms: changeable, mutable, variable
Example: The law was once considered immutable, but society’s views evolved.
IELTS Writing: Few cultural norms are truly immutable; they shift over generations.
IELTS Speaking: “Your past mistakes aren’t immutable – you can always do better.”

108. impair (C1)

Synonyms: damage, weaken, hinder
Antonyms: improve, enhance, strengthen
Example: Alcohol can seriously impair your ability to drive safely.
IELTS Writing: Excessive screen time may impair children’s cognitive development.
IELTS Speaking: “My cold has impaired my sense of taste.”

109. impartial (C1)

Synonyms: unbiased, neutral, objective
Antonyms: biased, partial, prejudiced
Example: A judge must remain completely impartial during a trial.
IELTS Writing: The impartial analysis of data is a cornerstone of good research.
IELTS Speaking: “I tried to be impartial, but it was hard because my friend was involved.”

110. impede (C1)

Synonyms: hinder, obstruct, delay
Antonyms: facilitate, assist, expedite
Example: The heavy snow impeded progress on the construction site.
IELTS Writing: Strict regulations can impede innovation in the tech sector.
IELTS Speaking: “Nothing will impede my plan to graduate this year.”

111. impervious (C2)

Synonyms: unaffected, immune, resistant
Antonyms: vulnerable, susceptible, sensitive
Example: The politician seemed impervious to the harsh criticism in the media.
IELTS Writing: No economy is impervious to global financial shocks.
IELTS Speaking: “I’m almost impervious to spicy food – I can eat anything.”

112. impetuous (C2)

Synonyms: impulsive, rash, hasty
Antonyms: cautious, deliberate, prudent
Example: His impetuous decision to quit his job without a backup plan worried his family.
IELTS Writing: Impetuous policymaking often leads to unintended consequences.
IELTS Speaking: “I can be a bit impetuous – I booked the holiday on a whim.”

113. implicit (C1)

Synonyms: implied, unspoken, understood
Antonyms: explicit, stated, overt
Example: There was an implicit trust between the two long‑time colleagues.
IELTS Writing: The author’s implicit bias influences the framing of the argument.
IELTS Speaking: “There was an implicit agreement that we’d split the bill.”

114. inadvertent (C1)

Synonyms: unintentional, accidental, unplanned
Antonyms: intentional, deliberate, planned
Example: An inadvertent click on a link led to a virus infecting the computer.
IELTS Writing: The study controls for inadvertent errors in data collection.
IELTS Speaking: “It was completely inadvertent – I didn’t mean to offend her.”

115. inane (C2)

Synonyms: silly, foolish, vacuous
Antonyms: sensible, meaningful, profound
Example: The conversation was filled with inane chatter about the weather.
IELTS Writing: An essay should avoid inane generalisations and unsupported claims.
IELTS Speaking: “We just made inane small talk for ten minutes.”

116. incessant (C1)

Synonyms: constant, unending, relentless
Antonyms: intermittent, sporadic, occasional
Example: The incessant noise from the construction site made it impossible to concentrate.
IELTS Writing: Incessant population growth in megacities strains public services.
IELTS Speaking: “The baby’s incessant crying kept us awake all night.”

117. incisive (C2)

Synonyms: sharp, penetrating, keen
Antonyms: vague, dull, superficial
Example: Her incisive analysis of the poem impressed the literature professor.
IELTS Writing: An incisive conclusion will leave a lasting impression on the reader.
IELTS Speaking: “He has an incisive wit – his comments are always spot‑on.”

118. incongruous (C2)

Synonyms: inappropriate, out of place, inconsistent
Antonyms: appropriate, harmonious, consistent
Example: The bright modern sculpture looked incongruous in the medieval square.
IELTS Writing: An incongruous example weakens the coherence of your paragraph.
IELTS Speaking: “Wearing a suit to the beach is a bit incongruous, don’t you think?”

119. indigenous (C1)

Synonyms: native, original, local
Antonyms: foreign, alien, imported
Example: The festival celebrates the traditions of the indigenous Sami people.
IELTS Writing: Indigenous knowledge about medicinal plants is increasingly valued.
IELTS Speaking: “I’d love to learn more about the indigenous culture of this region.”

120. indolent (C2)

Synonyms: lazy, idle, slothful
Antonyms: diligent, industrious, energetic
Example: The hot weather made the students feel indolent and unmotivated.
IELTS Writing: An indolent workforce can drag down a nation’s productivity.
IELTS Speaking: “I’m feeling rather indolent today – I might just stay in bed.”

121. infer (C1)

Synonyms: deduce, conclude, surmise
Antonyms: state explicitly, declare, announce
Example: From the data, we can infer a steady increase in average temperatures.
IELTS Writing: Do not expect the reader to infer your main argument; state it clearly.
IELTS Speaking: “I inferred from her tone that she wasn’t happy.”

122. inherent (C1)

Synonyms: intrinsic, innate, built‑in
Antonyms: acquired, extrinsic, external
Example: There are inherent risks associated with any surgical procedure.
IELTS Writing: The inherent complexity of the issue demands a nuanced approach.
IELTS Speaking: “Curiosity is an inherent human trait.”

123. innocuous (C1)

Synonyms: harmless, safe, inoffensive
Antonyms: harmful, dangerous, offensive
Example: The comment seemed innocuous, but it sparked a major argument.
IELTS Writing: What appears innocuous at first can have far‑reaching environmental effects.
IELTS Speaking: “It’s just an innocuous little spider – don’t panic.”

124. insatiable (C2)

Synonyms: unquenchable, voracious, greedy
Antonyms: satisfied, satiated, fulfilled
Example: Her insatiable appetite for knowledge led her to study four degrees.
IELTS Writing: The insatiable demand for consumer goods fuels environmental degradation.
IELTS Speaking: “I have an insatiable sweet tooth – I can never say no to cake.”

125. insidious (C2)

Synonyms: stealthy, subtle, treacherous
Antonyms: direct, obvious, straightforward
Example: The disease can have an insidious onset, with symptoms appearing gradually.
IELTS Writing: Insidious forms of discrimination can be harder to combat than overt prejudice.
IELTS Speaking: “Social media can have an insidious effect on self‑esteem.”

126. instigate (C1)

Synonyms: provoke, initiate, start
Antonyms: prevent, stop, quell
Example: The union leader tried to instigate a walkout over pay disputes.
IELTS Writing: New regulations often instigate a wave of innovation.
IELTS Speaking: “Who instigated that argument? It came out of nowhere.”

127. intrepid (C2)

Synonyms: fearless, brave, bold
Antonyms: cowardly, timid, fearful
Example: The intrepid explorer ventured into regions few had ever seen.
IELTS Writing: Intrepid entrepreneurs drive economic growth by taking calculated risks.
IELTS Speaking: “You have to be intrepid to try street food in a new country.”

128. intrinsic (C1)

Synonyms: inherent, essential, fundamental
Antonyms: extrinsic, external, added
Example: The intrinsic beauty of the landscape makes it a popular tourist spot.
IELTS Writing: Parents should encourage the intrinsic motivation to learn, not just reward grades.
IELTS Speaking: “For me, the intrinsic value of travelling is the experience, not the photos.”

129. inundate (C1)

Synonyms: flood, overwhelm, swamp
Antonyms: drain, dry, starve
Example: After the announcement, the office was inundated with calls.
IELTS Writing: Social media can inundate users with a constant stream of information.
IELTS Speaking: “I’m inundated with homework this weekend.”

130. inveterate (C2)

Synonyms: habitual, chronic, deep‑rooted
Antonyms: occasional, temporary, superficial
Example: As an inveterate traveller, she had visited over 80 countries.
IELTS Writing: Inveterate prejudices can take generations to overcome.
IELTS Speaking: “I’m an inveterate coffee drinker – I can’t start the day without it.”

J

131. jubilant (C1)

Synonyms: joyful, elated, exultant
Antonyms: sorrowful, despondent, miserable
Example: The streets were filled with jubilant fans celebrating the championship win.
IELTS Writing: A jubilant mood swept the nation after the peace treaty was signed.
IELTS Speaking: “I was absolutely jubilant when I received my visa.”

132. judicious (C2)

Synonyms: wise, prudent, sensible
Antonyms: foolish, reckless, unwise
Example: The judicious use of limited resources ensured the project’s success.
IELTS Writing: A judicious selection of vocabulary raises the quality of an essay.
IELTS Speaking: “I try to be judicious with my spending – impulse buys are rare.”

133. juxtapose (C1)

Synonyms: compare, contrast, set side by side
Antonyms: separate, isolate, divide
Example: The documentary juxtaposes scenes of wealth and poverty in the same city.
IELTS Writing: In Task 1, you may need to juxtapose two sets of data.
IELTS Speaking: “I love how the artist juxtaposes modern and traditional elements.”

K

134. keen (C1)

Synonyms: eager, enthusiastic, sharp
Antonyms: indifferent, reluctant, dull
Example: She is a keen advocate for renewable energy and writes extensively on the topic.
IELTS Writing: A keen understanding of grammar is essential for a high band score.
IELTS Speaking: “I’m not too keen on horror films – I prefer comedies.”

135. knack (C1)

Synonyms: talent, skill, gift
Antonyms: ineptitude, inability, weakness
Example: He has a knack for making complex ideas easy to understand.
IELTS Writing: Good teachers have a knack for engaging even the most reluctant students.
IELTS Speaking: “She’s got a real knack for languages – she picks them up so quickly.”

L

136. laconic (C2)

Synonyms: concise, terse, brief
Antonyms: verbose, long‑winded, wordy
Example: His laconic reply – “Fine” – made it clear he didn’t want to talk.
IELTS Writing: A laconic style can be powerful, but in IELTS essays some expansion is needed.
IELTS Speaking: “He’s a bit laconic; getting a full sentence out of him is a victory.”

137. lament (C1)

Synonyms: mourn, grieve, bewail
Antonyms: celebrate, rejoice, cheer
Example: The poet laments the loss of innocence in modern society.
IELTS Writing: Many commentators lament the decline of face‑to‑face communication.
IELTS Speaking: “I really lament not travelling more when I was younger.”

138. laudable (C1)

Synonyms: praiseworthy, commendable, admirable
Antonyms: shameful, despicable, blameworthy
Example: Her commitment to charity work is truly laudable.
IELTS Writing: While the aim is laudable, the method is questionable.
IELTS Speaking: “I think his determination is laudable, even if he didn’t succeed.”

139. lethargic (C1)

Synonyms: sluggish, drowsy, listless
Antonyms: energetic, lively, vigorous
Example: The scorching heat made the entire team feel lethargic.
IELTS Writing: A heavy lunch can induce a lethargic state that reduces afternoon productivity.
IELTS Speaking: “I always feel a bit lethargic after a long flight.”

140. levity (C2)

Synonyms: light‑heartedness, humour, frivolity
Antonyms: seriousness, gravity, solemnity
Example: A little levity can help break the tension in a stressful meeting.
IELTS Writing: Levity is rarely appropriate in formal academic prose.
IELTS Speaking: “We needed some levity after that intense discussion.”

141. loquacious (C2)

Synonyms: talkative, garrulous, verbose
Antonyms: quiet, silent, reticent
Example: The loquacious guide entertained the tourists with endless anecdotes.
IELTS Writing: Overly loquacious paragraphs can obscure your main point.
IELTS Speaking: “I can be quite loquacious once you get me onto my favourite topic.”

142. lucid (C1)

Synonyms: clear, coherent, intelligible
Antonyms: confusing, unclear, muddled
Example: Despite his illness, the patient remained lucid and responsive.
IELTS Writing: A lucid introduction is crucial for a high Coherence and Cohesion score.
IELTS Speaking: “Her explanation was so lucid that I understood it instantly.”

143. ludicrous (C1)

Synonyms: ridiculous, absurd, laughable
Antonyms: sensible, reasonable, serious
Example: The idea that the moon is made of cheese is ludicrous.
IELTS Writing: It would be ludicrous to suggest that education has no impact on income.
IELTS Speaking: “The prices in that shop are ludicrous – £10 for a cup of tea!”

M

144. magnanimous (C2)

Synonyms: generous, forgiving, noble
Antonyms: petty, mean, spiteful
Example: The winner was magnanimous in victory, praising her opponent’s effort.
IELTS Writing: A magnanimous gesture can restore diplomatic relations after a crisis.
IELTS Speaking: “It was really magnanimous of him to share the prize money.”

145. malevolent (C2)

Synonyms: malicious, spiteful, evil
Antonyms: benevolent, kind, good
Example: The witch in the story casts a malevolent spell on the village.
IELTS Writing: History is replete with examples of malevolent leaders causing mass suffering.
IELTS Speaking: “He gave me a malevolent glare – it gave me chills.”

146. malleable (C1)

Synonyms: pliable, flexible, adaptable
Antonyms: rigid, inflexible, stiff
Example: Young minds are highly malleable and receptive to new ideas.
IELTS Writing: Public opinion is more malleable during times of crisis.
IELTS Speaking: “Clay is wonderfully malleable – you can shape it into anything.”

147. mandate (C1)

Synonyms: order, command, directive
Antonyms: prohibition, denial, veto
Example: The government claims a clear mandate to raise the minimum wage.
IELTS Writing: The council’s mandate to improve infrastructure expires next year.
IELTS Speaking: “I didn’t have a mandate to sign anything on behalf of the team.”

148. manifest (C1)

Synonyms: obvious, clear, apparent
Antonyms: hidden, obscure, latent
Example: The benefits of exercise are manifest both physically and mentally.
IELTS Writing: The graph manifests a clear upward trend in urban migration.
IELTS Speaking: “Her anxiety was manifest in her trembling hands.”

149. maverick (C2)

Synonyms: individualist, nonconformist, free spirit
Antonyms: conformist, follower, traditionalist
Example: The maverick architect’s bold designs divided public opinion.
IELTS Writing: A maverick approach can lead to breakthroughs, but also to failure.
IELTS Speaking: “He’s a bit of a maverick – he never follows company rules.”

150. meticulous (C1)

Synonyms: thorough, precise, careful
Antonyms: careless, sloppy, negligent
Example: The meticulous accountant found an error of just one pence.
IELTS Writing: Meticulous planning is the secret to a well‑structured essay.
IELTS Speaking: “I’m not very meticulous with housework, I admit.”

151. mitigate (C1)

Synonyms: reduce, alleviate, lessen
Antonyms: aggravate, intensify, worsen
Example: Planting trees can help mitigate the effects of air pollution.
IELTS Writing: Green belts are designed to mitigate urban sprawl.
IELTS Speaking: “To mitigate the risk, I always back up my files.”

152. morose (C2)

Synonyms: gloomy, sullen, miserable
Antonyms: cheerful, joyful, buoyant
Example: The team was morose after losing the cup final on penalties.
IELTS Writing: Long periods of isolation can make individuals feel morose and withdrawn.
IELTS Speaking: “He’s been a bit morose lately – I think he’s stressed about exams.”

153. mundane (C1)

Synonyms: ordinary, routine, dull
Antonyms: extraordinary, exciting, remarkable
Example: She longed for adventure, tired of the mundane routine of office life.
IELTS Writing: Smart technology automates mundane household tasks.
IELTS Speaking: “My job can be a bit mundane sometimes, but I enjoy the people.”

154. munificent (C2)

Synonyms: generous, lavish, bountiful
Antonyms: stingy, miserly, mean
Example: The munificent donor contributed millions to the university’s research fund.
IELTS Writing: A munificent welfare state requires a high‑tax economy to sustain it.
IELTS Speaking: “The portions in that restaurant are munificent – I couldn’t finish my meal.”

N

155. nefarious (C2)

Synonyms: wicked, criminal, villainous
Antonyms: virtuous, good, honourable
Example: The hacking group was involved in a nefarious scheme to steal identities.
IELTS Writing: Nefarious online activities pose a growing threat to national security.
IELTS Speaking: “That company has a nefarious reputation for exploiting its workers.”

156. negligent (C1)

Synonyms: careless, neglectful, irresponsible
Antonyms: careful, attentive, diligent
Example: The surgeon was found negligent for leaving a sponge inside the patient.
IELTS Writing: Negligent disposal of waste has severe environmental repercussions.
IELTS Speaking: “I was a bit negligent with my dental check‑ups – now I need fillings.”

157. nonchalant (C1)

Synonyms: indifferent, casual, unconcerned
Antonyms: anxious, concerned, worried
Example: He tried to look nonchalant, but his hands were trembling.
IELTS Writing: A nonchalant attitude towards plagiarism can result in disqualification.
IELTS Speaking: “She was surprisingly nonchalant about the exam – I was a wreck!”

158. nostalgia (C1)

Synonyms: reminiscence, sentimentality, longing
Antonyms: indifference, coldness, future‑oriented
Example: The old photographs filled her with a deep sense of nostalgia.
IELTS Writing: Nostalgia for a romanticised past can hinder social progress.
IELTS Speaking: “I feel a lot of nostalgia when I hear songs from my childhood.”

159. notorious (C1)

Synonyms: infamous, disreputable, scandalous
Antonyms: unknown, obscure, reputable
Example: The neighbourhood was once notorious for its high crime rate.
IELTS Writing: The city is notorious for its crippling traffic congestion.
IELTS Speaking: “I’m notorious among my friends for being late.”

160. nuance (C1)

Synonyms: subtlety, shade, refinement
Antonyms: bluntness, crudeness, obviousness
Example: A good translator captures every nuance of the original text.
IELTS Writing: A Band 9 essay demonstrates an appreciation of nuance and complexity.
IELTS Speaking: “You missed the nuance of his comment – he was being sarcastic.”

O

161. obfuscate (C2)

Synonyms: confuse, obscure, muddle
Antonyms: clarify, elucidate, illuminate
Example: The technical jargon served only to obfuscate the real issue.
IELTS Writing: Overly complex sentence structures can obfuscate your meaning.
IELTS Speaking: “Don’t obfuscate – just tell me straight.”

162. obsolete (C1)

Synonyms: outdated, antiquated, superseded
Antonyms: modern, current, up‑to‑date
Example: Floppy disks have long been rendered obsolete by cloud storage.
IELTS Writing: Many traditional jobs are becoming obsolete due to automation.
IELTS Speaking: “My phone is practically obsolete – I need an upgrade.”

163. obstinate (C1)

Synonyms: stubborn, headstrong, inflexible
Antonyms: flexible, compliant, yielding
Example: The obstinate child refused to eat anything except pasta.
IELTS Writing: An obstinate refusal to compromise can derail peace talks.
IELTS Speaking: “He’s obstinate – once he’s made up his mind, that’s it.”

164. ominous (C1)

Synonyms: threatening, sinister, menacing
Antonyms: reassuring, promising, auspicious
Example: The dark clouds on the horizon looked ominous.
IELTS Writing: The economic indicators paint an ominous picture for the coming year.
IELTS Speaking: “The silence in the room was ominous – I knew something was wrong.”

165. opaque (C1)

Synonyms: unclear, obscure, non‑transparent
Antonyms: transparent, clear, lucid
Example: The reasoning behind the decision was frustratingly opaque.
IELTS Writing: Opaque bureaucratic processes reduce public trust.
IELTS Speaking: “The instructions were a bit opaque – I had to ask for help.”

166. opulent (C2)

Synonyms: luxurious, lavish, sumptuous
Antonyms: spartan, austere, humble
Example: The opulent palace was decorated with gold leaf and crystal chandeliers.
IELTS Writing: The opulent lifestyles of a few stand in stark contrast to widespread poverty.
IELTS Speaking: “The hotel was absolutely opulent – I felt like royalty.”

167. ostentatious (C2)

Synonyms: showy, flamboyant, pretentious
Antonyms: modest, restrained, unassuming
Example: His ostentatious display of wealth attracted criticism from neighbours.
IELTS Writing: An ostentatious writing style can detract from the substance of an argument.
IELTS Speaking: “That gold‑plated car is unnecessarily ostentatious.”

P

168. pacify (C1)

Synonyms: calm, soothe, appease
Antonyms: agitate, provoke, enrage
Example: The mother sang a lullaby to pacify the crying infant.
IELTS Writing: Governments sometimes introduce subsidies to pacify angry voters.
IELTS Speaking: “I gave my friend some chocolate to pacify her after the bad news.”

169. paradigm (C1)

Synonyms: model, pattern, framework
Antonyms: anomaly, deviation
Example: The internet created a new paradigm for communication.
IELTS Writing: A paradigm shift in energy production is needed to combat climate change.
IELTS Speaking: “The pandemic forced a complete paradigm shift in how I work.”

170. paradox (C1)

Synonyms: contradiction, inconsistency, conundrum
Antonyms: consistency, harmony, agreement
Example: It’s a paradox that the richest country has so many homeless people.
IELTS Writing: The paradox of choice suggests that too many options can make us unhappy.
IELTS Speaking: “It’s a paradox – the more I sleep, the more tired I feel.”

171. parochial (C2)

Synonyms: narrow‑minded, provincial, insular
Antonyms: broad‑minded, cosmopolitan, global
Example: His parochial attitudes made it hard for him to adapt to city life.
IELTS Writing: A parochial education system fails to prepare students for a globalised world.
IELTS Speaking: “My village can be a bit parochial – everyone knows everyone’s business.”

172. parsimonious (C2)

Synonyms: stingy, frugal, miserly
Antonyms: generous, lavish, extravagant
Example: The parsimonious manager refused to buy new equipment for the team.
IELTS Writing: A parsimonious approach to public spending can undermine essential services.
IELTS Speaking: “He’s so parsimonious he reuses tea bags three times.”

173. partisan (C1)

Synonyms: biased, one‑sided, factional
Antonyms: impartial, neutral, unbiased
Example: The news channel’s partisan coverage was criticised for lacking balance.
IELTS Writing: Partisan politics often hinders meaningful legislative reform.
IELTS Speaking: “I try not to get into partisan debates at family dinners.”

174. paucity (C2)

Synonyms: scarcity, shortage, lack
Antonyms: abundance, plenty, surplus
Example: The study was limited by a paucity of reliable data.
IELTS Writing: A paucity of green spaces in cities affects residents’ well‑being.
IELTS Speaking: “There’s a real paucity of vegan options in local restaurants.”

175. pedantic (C2)

Synonyms: fussy, nit‑picking, overscrupulous
Antonyms: relaxed, informal, easy‑going
Example: His pedantic corrections of minor grammar errors annoyed the group.
IELTS Writing: A pedantic focus on word count can harm the natural flow of an essay.
IELTS Speaking: “Don’t be so pedantic – you know what I meant.”

176. penchant (C1)

Synonyms: liking, fondness, inclination
Antonyms: dislike, aversion, antipathy
Example: She has a penchant for bold, colourful scarves.
IELTS Writing: The author’s penchant for long sentences can obscure his message.
IELTS Speaking: “I’ve always had a penchant for spicy food.”

177. perennial (C1)

Synonyms: perpetual, enduring, constant
Antonyms: occasional, temporary, fleeting
Example: Water shortages are a perennial problem in the region.
IELTS Writing: Inflation is a perennial concern for central banks worldwide.
IELTS Speaking: “Boredom in lectures is a perennial issue – nothing new.”

178. perfunctory (C2)

Synonyms: cursory, superficial, half‑hearted
Antonyms: thorough, careful, diligent
Example: The security guard gave my bag a perfunctory glance and waved me through.
IELTS Writing: A perfunctory conclusion can cost you marks in Coherence and Cohesion.
IELTS Speaking: “His apology was perfunctory – I don’t think he meant it.”

179. perilous (C1)

Synonyms: dangerous, hazardous, risky
Antonyms: safe, secure, sheltered
Example: The mountain pass becomes perilous in winter conditions.
IELTS Writing: Journalists in war zones face perilous situations daily.
IELTS Speaking: “Driving in the fog was absolutely perilous.”

180. permeate (C1)

Synonyms: pervade, saturate, fill
Antonyms: drain, empty, vacate
Example: The smell of freshly baked bread permeated the entire house.
IELTS Writing: Technology has permeated every aspect of modern life.
IELTS Speaking: “A sense of excitement permeated the room before the announcement.”

181. perpetuate (C1)

Synonyms: continue, sustain, prolong
Antonyms: stop, halt, cease
Example: Stereotypes in the media can perpetuate negative attitudes.
IELTS Writing: Fossil fuel subsidies perpetuate our dependence on carbon‑based energy.
IELTS Speaking: “We shouldn’t perpetuate the myth that artists can’t earn a living.”

182. pertinent (C1)

Synonyms: relevant, applicable, appropriate
Antonyms: irrelevant, immaterial, unrelated
Example: She asked a number of pertinent questions about the budget.
IELTS Writing: Make sure every example is pertinent to your thesis statement.
IELTS Speaking: “That’s a pertinent point – we should definitely consider it.”

183. pervasive (C1)

Synonyms: widespread, prevalent, ubiquitous
Antonyms: rare, scarce, limited
Example: The pervasive influence of social media on teenagers is a growing concern.
IELTS Writing: A pervasive culture of consumerism drives environmental degradation.
IELTS Speaking: “Smartphones have become pervasive – you see them everywhere.”

184. placate (C1)

Synonyms: appease, pacify, soothe
Antonyms: provoke, anger, agitate
Example: The company tried to placate angry customers with discount vouchers.
IELTS Writing: Superficial reforms may temporarily placate protestors but fail to address root causes.
IELTS Speaking: “I brought flowers to placate my mum after I’d dented her car.”

185. plausible (C1)

Synonyms: believable, credible, reasonable
Antonyms: implausible, unbelievable, unlikely
Example: His excuse sounded plausible, but I had my doubts.
IELTS Writing: A plausible solution to traffic congestion is investing in public transport.
IELTS Speaking: “It’s plausible that she simply forgot – she’s been very busy.”

186. plethora (C1)

Synonyms: abundance, excess, surplus
Antonyms: dearth, scarcity, lack
Example: The internet offers a plethora of information, not all of it reliable.
IELTS Writing: A plethora of studies confirms the link between diet and lifespan.
IELTS Speaking: “There’s a plethora of coffee shops in this neighbourhood.”

187. poignant (C1)

Synonyms: touching, moving, emotional
Antonyms: unemotional, indifferent, detached
Example: The memorial service was a poignant reminder of the soldiers’ sacrifice.
IELTS Writing: Personal stories add a poignant dimension to statistical data.
IELTS Speaking: “That final scene was so poignant – I cried.”

188. pragmatic (C1)

Synonyms: practical, realistic, sensible
Antonyms: idealistic, impractical, theoretical
Example: We need a pragmatic approach that balances cost and environmental impact.
IELTS Writing: Policymakers must adopt pragmatic solutions rather than ideological ones.
IELTS Speaking: “I’m a pragmatic person – I don’t dream, I plan.”

189. precarious (C1)

Synonyms: unstable, insecure, risky
Antonyms: secure, stable, safe
Example: The ladder felt precarious, so I asked someone to hold it.
IELTS Writing: Gig economy workers often face precarious employment conditions.
IELTS Speaking: “My finances were a bit precarious after I lost my job.”

190. preclude (C2)

Synonyms: prevent, prohibit, rule out
Antonyms: allow, permit, enable
Example: His criminal record may preclude him from entering the country.
IELTS Writing: A lack of funding need not preclude high‑quality research.
IELTS Speaking: “My busy schedule doesn’t preclude a social life – I just have to plan.”

191. predilection (C2)

Synonyms: preference, fondness, inclination
Antonyms: dislike, aversion, antipathy
Example: He has a predilection for vintage cars from the 1960s.
IELTS Writing: The government’s predilection for short‑term fixes is damaging long‑term growth.
IELTS Speaking: “I’ve got a predilection for dark chocolate – milk chocolate is too sweet.”

192. preeminent (C2)

Synonyms: foremost, leading, supreme
Antonyms: inferior, subordinate, minor
Example: She is the preeminent expert on Roman pottery in the country.
IELTS Writing: The university aims to maintain its preeminent position in medical research.
IELTS Speaking: “He’s the preeminent guitarist of his generation, no doubt.”

193. presumptuous (C2)

Synonyms: arrogant, overconfident, forward
Antonyms: modest, humble, respectful
Example: It would be presumptuous to assume I’ll get the job just because I was interviewed.
IELTS Writing: Avoid making presumptuous claims without supporting evidence.
IELTS Speaking: “I hope I’m not being presumptuous, but I ordered a drink for you.”

194. pristine (C1)

Synonyms: unspoiled, immaculate, perfect
Antonyms: polluted, dirty, contaminated
Example: We walked for miles along a pristine, empty beach.
IELTS Writing: Pristine wilderness areas are increasingly rare and must be protected.
IELTS Speaking: “The car is in pristine condition – it looks brand new.”

195. proclivity (C2)

Synonyms: tendency, inclination, predisposition
Antonyms: aversion, disinclination, dislike
Example: Her proclivity for overthinking sometimes stops her from making decisions.
IELTS Writing: Humans have a natural proclivity to seek social connections.
IELTS Speaking: “I have a proclivity for leaving things to the last minute.”

196. prodigious (C2)

Synonyms: enormous, immense, colossal
Antonyms: tiny, minute, insignificant
Example: The pianist’s prodigious talent was evident from the age of four.
IELTS Writing: A prodigious amount of data is generated every second on the internet.
IELTS Speaking: “He has a prodigious appetite – I don’t know where he puts it all.”

197. prolific (C1)

Synonyms: productive, fertile, abundant
Antonyms: unproductive, barren, meagre
Example: She is a prolific writer, publishing three novels a year.
IELTS Writing: The country has been a prolific producer of scientific research.
IELTS Speaking: “My tomato plants have been prolific this summer.”

198. promulgate (C2)

Synonyms: proclaim, broadcast, disseminate
Antonyms: suppress, conceal, withhold
Example: The government plans to promulgate new safety regulations next month.
IELTS Writing: Social media can be used to promulgate important public health messages.
IELTS Speaking: “The club promulgated a new set of rules after the incident.”

199. propensity (C1)

Synonyms: tendency, inclination, disposition
Antonyms: disinclination, aversion, reluctance
Example: He has a worrying propensity to gamble with money he doesn’t have.
IELTS Writing: Children have a natural propensity for language acquisition.
IELTS Speaking: “I have a propensity to oversleep when I don’t set an alarm.”

200. proponent (C1)

Synonyms: advocate, supporter, champion
Antonyms: opponent, critic, detractor
Example: She is a leading proponent of organic farming methods.
IELTS Writing: Proponents of free trade argue that it boosts global prosperity.
IELTS Speaking: “I’m a big proponent of learning a musical instrument.”

201. prosaic (C2)

Synonyms: mundane, ordinary, dull
Antonyms: poetic, imaginative, exciting
Example: The reality of living in Paris was more prosaic than the romantic fantasy.
IELTS Writing: The report offers a prosaic but accurate description of the problem.
IELTS Speaking: “My daily routine is pretty prosaic – work, gym, sleep.”

202. provocative (C1)

Synonyms: stimulating, challenging, inflammatory
Antonyms: boring, soothing, calming
Example: The documentary made a provocative claim about the origins of the virus.
IELTS Writing: A provocative opening statement can engage the reader instantly.
IELTS Speaking: “I enjoy provocative conversations that challenge my views.”

203. prudent (C1)

Synonyms: wise, sensible, cautious
Antonyms: reckless, foolish, rash
Example: It would be prudent to save some money for emergencies.
IELTS Writing: A prudent government invests in both infrastructure and education.
IELTS Speaking: “I think it’s prudent to check the reviews before booking.”

204. pugnacious (C2)

Synonyms: aggressive, belligerent, combative
Antonyms: peaceful, gentle, friendly
Example: His pugnacious debating style often alienated the audience.
IELTS Writing: A pugnacious political climate discourages compromise.
IELTS Speaking: “He’s a bit pugnacious after a few drinks – I’d avoid him.”

205. punctilious (C2)

Synonyms: meticulous, precise, scrupulous
Antonyms: careless, lax, sloppy
Example: The punctilious waiter arranged the cutlery with millimetre precision.
IELTS Writing: Punctilious attention to referencing can improve your academic credibility.
IELTS Speaking: “She’s so punctilious about her car – don’t eat in it!”

Q

206. quandary (C1)

Synonyms: dilemma, predicament, puzzle
Antonyms: solution, answer, certainty
Example: I’m in a quandary about whether to accept the job in London or stay here.
IELTS Writing: Ethical quandaries frequently arise in medical research.
IELTS Speaking: “It’s a real quandary – both options have major drawbacks.”

207. querulous (C2)

Synonyms: complaining, whining, peevish
Antonyms: cheerful, contented, patient
Example: The querulous customer demanded to see the manager over a tiny scratch.
IELTS Writing: A querulous tone in your essay can undermine an otherwise strong argument.
IELTS Speaking: “I try not to be querulous, but the noise was driving me crazy.”

208. quintessential (C1)

Synonyms: typical, archetypal, perfect
Antonyms: atypical, unrepresentative, imperfect
Example: The small fishing village is the quintessential image of coastal life.
IELTS Writing: Switzerland is often seen as the quintessential example of direct democracy.
IELTS Speaking: “That café is the quintessential Parisian experience – tiny, cosy, perfect.”

R

209. rampant (C1)

Synonyms: widespread, uncontrolled, unrestrained
Antonyms: controlled, limited, restrained
Example: Corruption was rampant in the construction industry at the time.
IELTS Writing: Rampant inflation erodes the purchasing power of ordinary citizens.
IELTS Speaking: “Rumours were rampant about the CEO’s sudden departure.”

210. rancour (C2)

Synonyms: bitterness, resentment, hostility
Antonyms: goodwill, harmony, friendliness
Example: The dispute ended, but a feeling of rancour lingered between the two families.
IELTS Writing: Political debate should be conducted without rancour or personal attacks.
IELTS Speaking: “I don’t hold any rancour towards her – it’s all in the past.”

211. rebut (C1)

Synonyms: refute, counter, disprove
Antonyms: confirm, support, verify
Example: The scientist took the opportunity to rebut the misleading claims in the press.
IELTS Writing: In your essay, anticipate and rebut counter‑arguments to strengthen your position.
IELTS Speaking: “I’d like to rebut that point – the evidence suggests otherwise.”

212. recalcitrant (C2)

Synonyms: stubborn, defiant, obstinate
Antonyms: compliant, obedient, cooperative
Example: The recalcitrant student refused to follow any of the classroom rules.
IELTS Writing: Recalcitrant industries often resist environmental regulation.
IELTS Speaking: “My cat is recalcitrant – she never comes when I call her.”

213. reconcile (C1)

Synonyms: settle, resolve, harmonise
Antonyms: conflict, disagree, alienate
Example: It is difficult to reconcile the demands of a career with family life.
IELTS Writing: Governments must reconcile economic growth with environmental protection.
IELTS Speaking: “After years of not speaking, they finally reconciled.”

214. redundant (C1)

Synonyms: unnecessary, superfluous, excessive
Antonyms: necessary, essential, vital
Example: The new software made several positions in the company redundant.
IELTS Writing: Avoid redundant phrases like “past history” or “free gift”.
IELTS Speaking: “That sentence is redundant – you’ve already made the point.”

215. refute (C1)

Synonyms: disprove, counter, contradict
Antonyms: prove, confirm, support
Example: The lawyer managed to refute the prosecution’s key evidence.
IELTS Writing: You must provide data to refute the opposing view effectively.
IELTS Speaking: “I can’t refute that – you’re absolutely right.”

216. reiterate (C1)

Synonyms: repeat, restate, reaffirm
Antonyms: withdraw, retract, abandon
Example: Let me reiterate that there is no cause for alarm.
IELTS Writing: In your conclusion, reiterate your thesis in different words.
IELTS Speaking: “Just to reiterate – the train leaves at six, not seven.”

217. relinquish (C1)

Synonyms: give up, surrender, yield
Antonyms: retain, keep, hold
Example: The ageing king refused to relinquish the throne.
IELTS Writing: Smokers often struggle to relinquish a deeply ingrained habit.
IELTS Speaking: “I had to relinquish my dream of being a dancer after the injury.”

218. reminiscent (C1)

Synonyms: evocative, nostalgic, suggestive
Antonyms: un‑evocative, forgetful, unrelated
Example: The architecture is reminiscent of the grand Victorian railway stations.
IELTS Writing: The situation is reminiscent of the economic crash a decade ago.
IELTS Speaking: “This soup is reminiscent of my grandmother’s cooking.”

219. replenish (C1)

Synonyms: refill, restock, restore
Antonyms: deplete, empty, exhaust
Example: A good night’s sleep can replenish your energy levels.
IELTS Writing: Forests help replenish oxygen and absorb carbon dioxide.
IELTS Speaking: “I need to replenish my fridge – it’s completely empty.”

220. reprehensible (C2)

Synonyms: deplorable, disgraceful, shameful
Antonyms: admirable, commendable, praiseworthy
Example: The politician’s racist comments were universally condemned as reprehensible.
IELTS Writing: Animal cruelty is a morally reprehensible practice.
IELTS Speaking: “What he did was utterly reprehensible – there’s no excuse.”

221. resilient (C1)

Synonyms: tough, robust, adaptable
Antonyms: fragile, vulnerable, weak
Example: Children can be remarkably resilient in the face of adversity.
IELTS Writing: A resilient economy can withstand external shocks.
IELTS Speaking: “I’m quite resilient – I bounce back from setbacks quickly.”

222. reticent (C1)

Synonyms: reserved, quiet, hesitant
Antonyms: forthcoming, talkative, expansive
Example: She was reticent about her achievements, preferring to praise her team.
IELTS Writing: The government remained reticent on the details of the trade deal.
IELTS Speaking: “He’s quite reticent in large groups, but one‑on‑one he’s chatty.”

223. revere (C1)

Synonyms: admire, respect, venerate
Antonyms: despise, scorn, disdain
Example: The national hero is revered by people of all ages.
IELTS Writing: In some cultures, elders are revered for their wisdom.
IELTS Speaking: “I really revere my grandfather – he built his own business from nothing.”

224. rhetoric (C1)

Synonyms: oratory, eloquence, discourse
Antonyms: silence, inarticulateness
Example: The politician’s fiery rhetoric rallied the crowd.
IELTS Writing: Distinguish between political rhetoric and evidence‑based policy.
IELTS Speaking: “It’s just empty rhetoric – he never follows through.”

225. rigorous (C1)

Synonyms: strict, thorough, meticulous
Antonyms: lax, careless, lenient
Example: The university enforces rigorous academic standards.
IELTS Writing: A rigorous analysis of the data reveals several anomalies.
IELTS Speaking: “My trainer put me through a rigorous workout yesterday.”

S

226. sagacious (C2)

Synonyms: wise, insightful, astute
Antonyms: foolish, unwise, stupid
Example: The sagacious old judge’s rulings were rarely appealed.
IELTS Writing: A sagacious leader listens to diverse opinions before deciding.
IELTS Speaking: “My grandmother gave me some sagacious advice about marriage.”

227. salient (C1)

Synonyms: important, notable, prominent
Antonyms: insignificant, minor, negligible
Example: The most salient feature of the new phone is its battery life.
IELTS Writing: The report highlights the salient points in an executive summary.
IELTS Speaking: “Let me summarise the salient points of the discussion.”

228. sanguine (C2)

Synonyms: optimistic, hopeful, confident
Antonyms: pessimistic, gloomy, despairing
Example: She remained sanguine about the outcome, despite the challenges.
IELTS Writing: Some economists are less sanguine about the prospects for recovery.
IELTS Speaking: “I’m fairly sanguine – I think things will work out fine.”

229. scrutiny (C1)

Synonyms: inspection, examination, analysis
Antonyms: glance, oversight, neglect
Example: The company’s accounts came under intense scrutiny from regulators.
IELTS Writing: Public figures must accept a degree of media scrutiny.
IELTS Speaking: “My essay didn’t stand up to my tutor’s scrutiny.”

230. sedentary (C1)

Synonyms: inactive, seated, immobile
Antonyms: active, mobile, energetic
Example: A sedentary lifestyle can increase the risk of heart disease.
IELTS Writing: Modern office jobs tend to be highly sedentary.
IELTS Speaking: “My job is quite sedentary – I’m at a desk all day.”

231. seminal (C2)

Synonyms: influential, groundbreaking, pivotal
Antonyms: unimportant, minor, derivative
Example: Her seminal paper on black holes changed the course of astrophysics.
IELTS Writing: The book is considered a seminal work in the field of linguistics.
IELTS Speaking: “That documentary was seminal – it shaped my career choice.”

232. serendipity (C2)

Synonyms: chance, fortune, luck
Antonyms: misfortune, bad luck, design
Example: Finding that rare book in a second‑hand shop was pure serendipity.
IELTS Writing: Scientific breakthroughs are sometimes the result of serendipity.
IELTS Speaking: “Meeting my best friend was a case of serendipity – we sat next to each other on a train.”

233. specious (C2)

Synonyms: misleading, false, deceptive
Antonyms: valid, sound, genuine
Example: The advert makes a specious claim that the cream erases wrinkles instantly.
IELTS Writing: Specious arguments often rely on emotional manipulation rather than logic.
IELTS Speaking: “That’s a specious comparison – the two situations are totally different.”

234. sporadic (C1)

Synonyms: occasional, intermittent, irregular
Antonyms: constant, continuous, frequent
Example: Sporadic gunfire could be heard throughout the night.
IELTS Writing: Sporadic internet access in rural areas hampers online education.
IELTS Speaking: “My gym attendance has been a bit sporadic lately.”

235. stagnant (C1)

Synonyms: still, motionless, sluggish
Antonyms: flowing, dynamic, moving
Example: Wages have remained stagnant while living costs continue to rise.
IELTS Writing: A stagnant economy fails to provide opportunities for young people.
IELTS Speaking: “The water in the pond was stagnant and smelly.”

236. steadfast (C1)

Synonyms: loyal, firm, unwavering
Antonyms: wavering, fickle, disloyal
Example: She has been a steadfast supporter of the charity for over 30 years.
IELTS Writing: A steadfast commitment to human rights must be at the core of foreign policy.
IELTS Speaking: “I’ve remained steadfast in my decision to become a doctor.”

237. stigmatise (C1)

Synonyms: brand, label, condemn
Antonyms: praise, honour, celebrate
Example: Society should not stigmatise those who suffer from mental illness.
IELTS Writing: Media portrayals can stigmatise certain communities unfairly.
IELTS Speaking: “Being unemployed should not be stigmatised – it can happen to anyone.”

238. stoic (C2)

Synonyms: unemotional, impassive, resigned
Antonyms: emotional, expressive, volatile
Example: He remained stoic throughout the funeral, but broke down later.
IELTS Writing: A stoic acceptance of hardship can be both a strength and a limitation.
IELTS Speaking: “I tried to be stoic, but I cried when I saw the bill.”

239. stringent (C1)

Synonyms: strict, severe, rigorous
Antonyms: lenient, lax, flexible
Example: The country has some of the most stringent food safety regulations in the world.
IELTS Writing: Stringent measures are needed to curb carbon emissions.
IELTS Speaking: “My school had stringent rules about uniform – even sock colour.”

240. succinct (C1)

Synonyms: concise, brief, to the point
Antonyms: long‑winded, verbose, wordy
Example: Her presentation was succinct, covering all key points in ten minutes.
IELTS Writing: Aim for succinct paragraphs that communicate one clear idea each.
IELTS Speaking: “Give me a succinct summary – I don’t need all the details.”

241. superficial (C1)

Synonyms: shallow, surface‑level, cursory
Antonyms: deep, profound, thorough
Example: A superficial reading of the novel misses its deeper themes.
IELTS Writing: Superficial analysis will not earn a high band score.
IELTS Speaking: “We had a superficial chat – just about the weather and things.”

242. supersede (C1)

Synonyms: replace, displace, succeed
Antonyms: retain, keep, preserve
Example: Digital downloads have largely superseded physical CDs.
IELTS Writing: New evidence may supersede previous findings.
IELTS Speaking: “Email has superseded letters for most personal communication.”

243. surreptitious (C2)

Synonyms: secret, furtive, stealthy
Antonyms: open, overt, obvious
Example: He took a surreptitious glance at his watch during the boring meeting.
IELTS Writing: Surreptitious data collection by apps raises serious privacy concerns.
IELTS Speaking: “I was a bit surreptitious about opening the letter – it wasn’t addressed to me.”

T

244. taciturn (C2)

Synonyms: quiet, reserved, uncommunicative
Antonyms: talkative, loquacious, garrulous
Example: The taciturn farmer rarely spoke more than a few words at a time.
IELTS Writing: A taciturn protagonist can create an air of mystery in a novel.
IELTS Speaking: “My grandfather was quite taciturn, but his hugs said everything.”

245. tangible (C1)

Synonyms: real, concrete, physical
Antonyms: intangible, abstract, imaginary
Example: The new manager brought tangible improvements to team morale.
IELTS Writing: The policy has had a tangible impact on reducing poverty.
IELTS Speaking: “I need tangible proof before I believe it.”

246. tedious (C1)

Synonyms: boring, monotonous, dull
Antonyms: exciting, interesting, stimulating
Example: Data entry can be a tedious task if you don’t take breaks.
IELTS Writing: Avoid tedious repetition by using synonyms and paraphrasing.
IELTS Speaking: “The lecture was so tedious I struggled to stay awake.”

247. temerity (C2)

Synonyms: audacity, boldness, nerve
Antonyms: caution, timidity, reserve
Example: He had the temerity to criticise the CEO in front of the whole board.
IELTS Writing: Only a politician with great temerity would propose such radical reforms.
IELTS Speaking: “She had the temerity to ask for a raise on her first day – unbelievable!”

248. tentative (C1)

Synonyms: hesitant, uncertain, provisional
Antonyms: definite, certain, conclusive
Example: We have made a tentative booking for the venue, subject to confirmation.
IELTS Writing: Draw a tentative conclusion if the evidence is not yet conclusive.
IELTS Speaking: “I’m a bit tentative about signing the contract without reading the fine print.”

249. tenuous (C2)

Synonyms: weak, fragile, flimsy
Antonyms: strong, solid, robust
Example: The connection between the two events is tenuous at best.
IELTS Writing: The argument relies on a tenuous assumption that is not supported by data.
IELTS Speaking: “My grasp of quantum physics is pretty tenuous, I’ll admit.”

250. terse (C2)

Synonyms: concise, abrupt, brief
Antonyms: verbose, lengthy, wordy
Example: Her terse email simply read, “Meeting cancelled.”
IELTS Writing: A terse conclusion can sound dismissive; aim for a balanced tone.
IELTS Speaking: “He gave a terse reply and walked off – I think he was annoyed.”

251. thwart (C1)

Synonyms: frustrate, foil, prevent
Antonyms: aid, assist, facilitate
Example: The security team thwarted the attempted break‑in.
IELTS Writing: International cooperation is essential to thwart cybercrime.
IELTS Speaking: “Bad weather thwarted our plans for a beach day.”

252. torpid (C2)

Synonyms: sluggish, lethargic, inactive
Antonyms: energetic, lively, active
Example: The company’s torpid response to the crisis cost it valuable customers.
IELTS Writing: A torpid economy requires stimulus to regain momentum.
IELTS Speaking: “I feel torpid after a heavy lunch – I need a nap.”

253. transient (C1)

Synonyms: temporary, fleeting, short‑lived
Antonyms: permanent, lasting, enduring
Example: The city has a large transient population of students and seasonal workers.
IELTS Writing: Trends on social media are often transient and quickly forgotten.
IELTS Speaking: “My happiness was transient – the bad news arrived an hour later.”

254. trepidation (C2)

Synonyms: fear, anxiety, apprehension
Antonyms: calmness, confidence, assurance
Example: She approached the stage with considerable trepidation.
IELTS Writing: Many workers view the rise of artificial intelligence with trepidation.
IELTS Speaking: “I felt a bit of trepidation before my IELTS Speaking test.”

255. trivial (C1)

Synonyms: insignificant, minor, unimportant
Antonyms: important, significant, major
Example: We spent the whole meeting discussing trivial details.
IELTS Writing: Do not waste words on trivial examples that add no value to your argument.
IELTS Speaking: “It seems trivial now, but at the time it was a huge deal.”

U

256. ubiquitous (C1)

Synonyms: everywhere, pervasive, omnipresent
Antonyms: rare, scarce, absent
Example: Smartphones have become ubiquitous in modern society.
IELTS Writing: The ubiquitous presence of advertising shapes consumer behaviour.
IELTS Speaking: “Coffee shops are ubiquitous in this city – one on every corner.”

257. undermine (C1)

Synonyms: weaken, sabotage, erode
Antonyms: strengthen, support, reinforce
Example: Constant criticism can undermine a child’s confidence.
IELTS Writing: Fake news has the power to undermine democratic processes.
IELTS Speaking: “I don’t want to undermine your authority, but I think you’re wrong.”

258. unequivocal (C2)

Synonyms: clear, unambiguous, definite
Antonyms: ambiguous, vague, unclear
Example: The tests provided unequivocal evidence of the drug’s effectiveness.
IELTS Writing: An unequivocal statement of your position is essential in the introduction.
IELTS Speaking: “Let me be unequivocal – I will not support this proposal.”

259. unprecedented (C1)

Synonyms: unparalleled, extraordinary, unmatched
Antonyms: ordinary, normal, common
Example: The pandemic led to an unprecedented global economic shutdown.
IELTS Writing: The scale of the refugee crisis is unprecedented in recent history.
IELTS Speaking: “The heatwave last summer was unprecedented – 40 degrees!”

260. unscrupulous (C2)

Synonyms: dishonest, unethical, immoral
Antonyms: honest, ethical, principled
Example: Unscrupulous landlords often exploit vulnerable tenants.
IELTS Writing: Regulations are needed to prevent unscrupulous marketing practices.
IELTS Speaking: “That salesman was so unscrupulous – he lied about the contract terms.”

261. upheaval (C1)

Synonyms: disruption, turmoil, chaos
Antonyms: stability, calm, peace
Example: The industrial revolution caused massive social upheaval.
IELTS Writing: Political upheaval often discourages foreign investment.
IELTS Speaking: “Moving house is such an upheaval – I hate packing.”

262. urbane (C2)

Synonyms: sophisticated, suave, polished
Antonyms: unsophisticated, rough, rustic
Example: The urbane diplomat charmed everyone at the reception.
IELTS Writing: An urbane style of writing can make an essay feel sophisticated.
IELTS Speaking: “He’s very urbane – always knows the right thing to say.”

V

263. vacillate (C2)

Synonyms: waver, hesitate, fluctuate
Antonyms: decide, settle, resolve
Example: She vacillated between the two job offers for weeks.
IELTS Writing: A writer who vacillates between ideas loses the reader’s trust.
IELTS Speaking: “I’m vacillating between pizza and sushi – I can’t decide.”

264. vehement (C2)

Synonyms: passionate, forceful, intense
Antonyms: mild, weak, apathetic
Example: The proposal was met with vehement opposition from local residents.
IELTS Writing: A vehement defence of an idea is more persuasive when backed by evidence.
IELTS Speaking: “I’m vehement about the need for better public transport.”

265. venerate (C2)

Synonyms: revere, worship, honour
Antonyms: despise, scorn, disregard
Example: In ancient times, people venerated the sun as a god.
IELTS Writing: Many cultures venerate their ancestors through annual ceremonies.
IELTS Speaking: “I venerate my grandmother – she’s the strongest person I know.”

266. verbose (C1)

Synonyms: wordy, long‑winded, rambling
Antonyms: concise, succinct, brief
Example: The verbose report could have been reduced to two pages.
IELTS Writing: A verbose essay often loses clarity; be precise with your language.
IELTS Speaking: “I can be a bit verbose when I’m nervous – I just keep talking.”

267. viable (C1)

Synonyms: feasible, workable, practical
Antonyms: impractical, unworkable, impossible
Example: Electric cars are now a viable alternative to petrol vehicles.
IELTS Writing: Only a viable long‑term strategy can solve the housing crisis.
IELTS Speaking: “Is online learning a viable option for practical subjects? I’m not convinced.”

268. vicarious (C2)

Synonyms: indirect, secondary, surrogate
Antonyms: direct, personal, first‑hand
Example: I get a vicarious thrill from watching extreme sports.
IELTS Writing: Travel documentaries provide vicarious experiences of distant cultures.
IELTS Speaking: “I live vicariously through my friend’s travel photos.”

269. vigilant (C1)

Synonyms: watchful, alert, attentive
Antonyms: careless, inattentive, negligent
Example: Parents must remain vigilant about their children’s online activity.
IELTS Writing: Vigilant monitoring of financial markets can prevent crises.
IELTS Speaking: “I’m always vigilant about locking the front door at night.”

270. vilify (C2)

Synonyms: defame, demonise, slander
Antonyms: praise, honour, glorify
Example: The press was accused of attempting to vilify the whistleblower.
IELTS Writing: It is unjust to vilify an entire generation based on stereotypes.
IELTS Speaking: “The media really vilified him, but I think he was innocent.”

271. vindicate (C2)

Synonyms: justify, clear, exonerate
Antonyms: accuse, blame, convict
Example: The new evidence finally vindicated the man who had been wrongly jailed.
IELTS Writing: The results vindicate the researchers’ controversial hypothesis.
IELTS Speaking: “I felt totally vindicated when the truth came out.”

272. visceral (C2)

Synonyms: instinctive, deep‑seated, gut
Antonyms: intellectual, rational, cerebral
Example: Horror films aim to provoke a visceral reaction of fear.
IELTS Writing: The issue triggers a visceral emotional response that can cloud rational debate.
IELTS Speaking: “I have a visceral dislike for the sound of nails on a blackboard.”

273. vitriolic (C2)

Synonyms: bitter, caustic, scathing
Antonyms: kind, gentle, mild
Example: The online debate descended into vitriolic personal attacks.
IELTS Writing: Vitriolic language weakens the credibility of an academic argument.
IELTS Speaking: “His vitriolic comments were completely uncalled for.”

274. vociferous (C2)

Synonyms: loud, outspoken, strident
Antonyms: quiet, silent, restrained
Example: A vociferous minority opposed the construction of the new road.
IELTS Writing: Vociferous calls for reform can be a powerful driver of social change.
IELTS Speaking: “He became quite vociferous when the topic of tax came up.”

275. volatile (C1)

Synonyms: unstable, unpredictable, explosive
Antonyms: stable, steady, calm
Example: The political situation remains volatile, with protests erupting daily.
IELTS Writing: Volatile currencies discourage international trade and investment.
IELTS Speaking: “He’s a bit volatile – you never know what mood he’ll be in.”

276. voracious (C1)

Synonyms: insatiable, greedy, avid
Antonyms: indifferent, uninterested, satisfied
Example: A voracious reader, she finishes at least four books a week.
IELTS Writing: The voracious global demand for energy drives deforestation.
IELTS Speaking: “I’ve got a voracious appetite after the gym.”

W

277. warrant (C1)

Synonyms: justify, merit, deserve
Antonyms: disprove, discredit, invalidate
Example: The situation is serious enough to warrant an immediate investigation.
IELTS Writing: The evidence does not warrant such a sweeping conclusion.
IELTS Speaking: “That film doesn’t warrant all the hype – it’s average at best.”

278. wary (C1)

Synonyms: cautious, careful, suspicious
Antonyms: trusting, unwary, careless
Example: I’m always wary of emails asking for personal information.
IELTS Writing: Consumers should be wary of exaggerated health claims.
IELTS Speaking: “I’m a bit wary of that neighbourhood at night.”

279. whimsical (C2)

Synonyms: fanciful, playful, capricious
Antonyms: serious, practical, grave
Example: The garden was filled with whimsical sculptures of animals.
IELTS Writing: A whimsical writing style is rarely suitable for academic tasks.
IELTS Speaking: “My aunt has a whimsical sense of fashion – she wears colourful hats.”

280. wistful (C1)

Synonyms: nostalgic, longing, melancholic
Antonyms: cheerful, satisfied, content
Example: She gave a wistful smile as she looked through the old photo album.
IELTS Writing: The closing paragraph has a wistful tone, reflecting on the passage of time.
IELTS Speaking: “I feel a bit wistful when I think about my university days.”

Z

281. zealous (C1)

Synonyms: passionate, fervent, enthusiastic
Antonyms: apathetic, indifferent, unenthusiastic
Example: The zealous campaigners worked tirelessly to protect the forest.
IELTS Writing: Zealous enforcement of the law can sometimes infringe on personal freedoms.
IELTS Speaking: “I’m quite zealous about recycling – my family thinks I’m obsessed.”

282. zenith (C1)

Synonyms: peak, summit, apex
Antonyms: nadir, bottom, depth
Example: The company reached its zenith in the late 1990s.
IELTS Writing: The empire’s cultural zenith was marked by extraordinary artistic output.
IELTS Speaking: “Winning that award was the zenith of my career so far.”

This is the Premium IELTS Vocabulary Resource. Use these words consistently in your practice, and you will see a tangible improvement in your Lexical Resource score.

Improving your IELTS vocabulary is a gradual process, but the results become clear when you practise consistently. The more often you study advanced words in context, the easier it becomes to remember them and use them naturally in your own answers. Do not focus only on learning definitions; pay attention to how each word appears in example sentences, how it changes in different contexts, and how it can strengthen your writing or speaking response. With regular revision and active use, these words can become part of your everyday English, not just a list on a page.

This page has been created to support serious IELTS learners who want better control over language and a stronger lexical range. Revisit these 282 Advanced IELTS Vocabulary Words whenever you prepare for a test, practise speaking, or write a new essay, and try to apply several words in your own sentences each time. Small, steady progress is often what leads to the biggest score improvement. Keep learning, keep using new vocabulary in context, and let this resource guide you toward more natural, more impressive, and more band-worthy IELTS performance.

You can download the free PDF book, 282 Advanced IELTS Vocabulary Words (C1–C2).