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You are here: Home / Vocabulary / 100 Cool Words You’ll Wish You Knew Sooner

100 Cool Words You’ll Wish You Knew Sooner

February 18, 2026

100 Cool Words You’ll Wish You Knew Sooner

No. Term Definition
1. Acuity Sharpness of perception or vision.
2. Adroit Skillful and quick in movement.
3. Aegis Protection; sponsorship; shielding influence.
4. Akimbo With hands on hips, elbows out.
5. Alacrity Brisk, cheerful readiness.
6. Aplomb Self-confidence under pressure.
7. Arcane Mysterious; known by few.
8. Assiduous Persistent, careful, and hardworking.
9. Auspicious Promising success; favorable.
10. Belie Contradict; fail to show truth.
11. Benevolent Kind and well-meaning.
12. Blithe Carefree and lighthearted.
13. Brevity Concise use of words.
14. Cacophony Harsh, discordant mixture of sounds.
15. Candor Honest, direct openness.
16. Capricious Impulsive; unpredictable.
17. Chicanery Trickery; deceptive practices.
18. Cogent Clear, logical, and convincing.
19. Conundrum A confusing, difficult problem.
20. Credulous Too ready to believe.
21. Dauntless Fearless; determined.
22. Debacle A sudden, humiliating failure.
23. Deft Neat and skillful.
24. Delineate Describe precisely; outline.
25. Dichotomy Division into two contrasting parts.
26. Ebullient Cheerful; full of energy.
27. Eclectic From varied sources; diverse.
28. Efficacious Effective; producing desired results.
29. Effrontery Shameless audacity; impudence.
30. Egregious Outstandingly bad; shocking.
31. Elucidate Make clear; explain.
32. Empathy Understanding another’s feelings.
33. Ennui Boredom from lack of interest.
34. Ephemeral Lasting a very short time.
35. Equanimity Calmness, even in difficulty.
36. Erudite Highly learned; scholarly.
37. Eschew Deliberately avoid.
38. Euphony Pleasantness of sound.
39. Exculpate Clear from blame.
40. Exigency Urgent need or demand.
41. Fastidious Very attentive to detail.
42. Fervor Intense passion or enthusiasm.
43. Florid Excessively elaborate; showy.
44. Furtive Secretive; attempting to avoid notice.
45. Garrulous Excessively talkative.
46. Germane Relevant to the matter.
47. Gossamer Delicate, light, and insubstantial.
48. Guile Cunning; sly deception.
49. Hackneyed Overused; unoriginal.
50. Halcyon Calm, peaceful, prosperous.
51. Hapless Unlucky; unfortunate.
52. Harbinger A forerunner; sign of something.
53. Hegemony Dominance or leadership, especially political.
54. Iconoclast One who challenges cherished beliefs.
55. Idiosyncrasy A distinctive personal habit.
56. Impetus A driving force or stimulus.
57. Incisive Sharp, clear, and direct.
58. Indelible Impossible to erase or forget.
59. Ineffable Too great to express in words.
60. Inexorable Impossible to stop or prevent.
61. Ingenuous Innocent and straightforward.
62. Inscrutable Difficult to understand or interpret.
63. Interregnum Interval between leaders or regimes.
64. Inure Accustom to something unpleasant.
65. Jaded Tired; lacking enthusiasm.
66. Jejune Dull; simplistic; immature.
67. Jettison Throw off; discard as unnecessary.
68. Jocund Cheerful and lighthearted.
69. Juxtapose Place side by side for contrast.
70. Kaleidoscopic Rapidly changing; varied and colorful.
71. Ken One’s knowledge or range of sight.
72. Kismet Fate; destiny.
73. Knavery Dishonest or crafty behavior.
74. Laconic Using very few words.
75. Liminal At a threshold; transitional.
76. Lucid Clear and easy to understand.
77. Lugubrious Mournful; gloomy.
78. Magnanimous Generous, especially to a rival.
79. Mellifluous Sweet-sounding; flowing smoothly.
80. Mendacious Lying; untruthful.
81. Meretricious Showy but lacking real value.
82. Meticulous Very careful and precise.
83. Munificent Very generous; lavish.
84. Nebulous Vague; ill-defined.
85. Nonplussed So surprised as to be unsure.
86. Obdurate Stubbornly refusing to change.
87. Obfuscate Make unclear; confuse.
88. Obviate Remove or prevent a need.
89. Onerous Burdensome; hard to endure.
90. Onus A burden or responsibility.
91. Ostensible Appearing true, possibly misleading.
92. Palimpsest Something reused, bearing traces of past.
93. Panacea A supposed cure-all.
94. Paragon A model of excellence.
95. Parsimonious Unwilling to spend; stingy.
96. Penchant A strong liking.
97. Peregrinate Travel or wander from place to place.
98. Perspicacious Keenly perceptive; insightful.
99. Petrichor Earthy smell after rain.
100. Phantasmagoria A shifting, dreamlike sequence of images.
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