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100 English Words You Probably Didn’t Know

February 4, 2026

No. Term Definition
1. Abditory a place to hide things
2. Absquatulate leave abruptly; run off
3. Accismus feigned refusal of something desired
4. Acersecomicke bitterly satirical
5. Adumbrate outline faintly; foreshadow
6. Aegis protection; sponsorship
7. Agelast a person who never laughs
8. Albescent becoming whitish
9. Alopecoid foxlike in appearance
10. Amaranthine unfading; everlasting
11. Anfractuous winding; full of twists
12. Anguilliform eel-shaped; snakelike
13. Antediluvian very old; antiquated
14. Aposiopesis sudden breaking off in speech
15. Apricity warmth of winter sunlight
16. Argle-bargle meaningless talk; nonsense
17. Arriviste ambitious social climber
18. Assibilate pronounce with a hissing sound
19. Ataraxia calmness; freedom from anxiety
20. Aureate golden; splendid
21. Autotelic done for its own sake
22. Bailiwick one’s area of expertise
23. Batrachian relating to frogs or toads
24. Bedizen dress gaudily
25. Bescumber defile with excrement
26. Borborygmus stomach rumbling
27. Boustrophedon alternating writing direction
28. Brontide distant rumbling thunder
29. Bumfuzzle confuse; fluster
30. Cacography bad handwriting or spelling
31. Cacophony harsh mixture of sounds
32. Catachresis misuse of a word
33. Celerity swiftness; speed
34. Chiaroscuro strong light-dark contrast
35. Chthonic of the underworld
36. Cimmerian very dark; gloomy
37. Coadunate joined into one
38. Crapulence illness from overeating/drinking
39. Crepuscular active at twilight
40. Cynosure center of attention
41. Dactylion tip of the middle finger
42. Defenestrate throw out a window
43. Deliquesce dissolve by absorbing moisture
44. Desideratum something desired or needed
45. Diaphanous light, delicate, translucent
46. Dithyramb wildly enthusiastic speech
47. Dudgeon resentful anger
48. Ebullient cheerful; full of energy
49. Ecdysiast a striptease performer
50. Efflorescence a powdery surface bloom
51. Eidolon phantom; idealized image
52. Eleutheromania mania for freedom
53. Emunctory organ that removes waste
54. Encephalon the brain
55. Ennui boredom; listlessness
56. Ephemeral lasting a very short time
57. Epizeuxis immediate repetition for emphasis
58. Erubescent reddening; blushing
59. Eucatastrophe sudden happy turn of events
60. Evanescent quickly fading
61. Exiguous very small; scanty
62. Farrago a mixed assortment
63. Felicific causing happiness
64. Fescennine obscene or scurrilous
65. Fugacious fleeting; lasting briefly
66. Funambulist a tightrope walker
67. Gambol play and skip about
68. Gastronome expert in fine eating
69. Gelid icy; extremely cold
70. Gibbous more than half full
71. Gloaming twilight; dusk
72. Gorgonize paralyze with fear
73. Haptics the sense of touch
74. Harridan a fierce, scolding woman
75. Hecatomb large-scale sacrifice or slaughter
76. Hircine goatlike; goaty
77. Hobbledehoy awkward adolescent boy
78. Hortatory urging to action; exhorting
79. Hylozoism belief matter is alive
80. Iatrogenic caused by medical treatment
81. Ignivomous vomiting fire; fiery
82. Imbroglio complicated, confusing situation
83. Ineluctable inescapable; unavoidable
84. Insouciant carefree; unconcerned
85. Interrobang combined ? and ! mark
86. Isagogics introductory instruction
87. Jactitation restless tossing in illness
88. Jejune dull; lacking interest
89. Jocund cheerful; merry
90. Juggernaut overwhelming force
91. Kakistocracy government by the worst
92. Kinesics study of body movement
93. Kleptomania compulsion to steal
94. Lachrymose tearful; prone to weeping
95. Lagniappe small extra gift
96. Lemniscate figure-eight curve
97. Limerence intense romantic infatuation
98. Logorrhea excessive talkativeness
99. Lugubrious mournful; dismal
100. Mellifluous sweetly flowing; melodious

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