| No. | Item | Definition |
|---|---|---|
| 1. | abstruse | difficult to understand deeply |
| 2. | absurd | wildly unreasonable or puzzling |
| 3. | allusive | indirectly suggestive and unclear |
| 4. | ambiguous | open to more than one meaning |
| 5. | anomalous | deviating confusingly from normal |
| 6. | arcane | understood by very few |
| 7. | baffling | extremely hard to understand |
| 8. | bewildering | causing great confusion |
| 9. | bizarre | very strange and confusing |
| 10. | botched | poorly done and confusing |
| 11. | buried | hard to notice or understand |
| 12. | byzantine | excessively complex and confusing |
| 13. | chaotic | wildly disordered and confusing |
| 14. | complicated | made of confusing parts |
| 15. | confounding | upsetting understanding or expectations |
| 16. | confusing | hard to understand clearly |
| 17. | convoluted | complex and hard to follow |
| 18. | counterintuitive | opposite of what seems logical |
| 19. | cryptic | having a hidden meaning |
| 20. | curious | strange and hard to explain |
| 21. | daunting | intimidatingly difficult |
| 22. | demanding | requiring strong mental effort |
| 23. | dense | hard to understand quickly |
| 24. | dicey | uncertain and difficult |
| 25. | disjointed | lacking clear connection |
| 26. | distorted | changed from accurate form |
| 27. | eccentric | odd in a confusing way |
| 28. | elliptical | leaving out needed words |
| 29. | elusive | hard to pin down |
| 30. | enigmatic | mysterious and hard to interpret |
| 31. | entangled | caught in confusing complexity |
| 32. | equivocal | uncertain or ambiguous in meaning |
| 33. | far-fetched | unlikely and hard to believe |
| 34. | fishy | oddly suspicious or puzzling |
| 35. | foggy | lacking clear meaning |
| 36. | foreign | strange or unfamiliar |
| 37. | formidable | very difficult to deal with |
| 38. | fragmentary | incomplete and hard to follow |
| 39. | garbled | distorted and hard to follow |
| 40. | hard | difficult to grasp |
| 41. | hazy | not clearly defined |
| 42. | head-scratching | causing puzzled thought |
| 43. | hidden | kept from clear view |
| 44. | illogical | not making clear sense |
| 45. | impenetrable | too difficult to understand |
| 46. | incomprehensible | impossible to understand |
| 47. | inconsistent | not logically matching throughout |
| 48. | inexplicable | hard to account for |
| 49. | inscrutable | impossible to interpret |
| 50. | intricate | complex in detailed ways |
| 51. | involved | complicated and confusing |
| 52. | irrational | not based on reason |
| 53. | jumbled | mixed up confusingly |
| 54. | knotty | difficult to solve or explain |
| 55. | labyrinthine | very complex and confusing |
| 56. | masked | concealed in a confusing way |
| 57. | mind-boggling | astonishingly hard to grasp |
| 58. | misleading | giving a wrong impression |
| 59. | muddling | causing mental confusion |
| 60. | muddy | confused or unclear |
| 61. | murky | unclear and hard to interpret |
| 62. | mysterious | difficult to explain or understand |
| 63. | mystifying | making something hard to explain |
| 64. | nonsensical | making no clear sense |
| 65. | novel | new and hard to grasp |
| 66. | oblique | indirect and hard to grasp |
| 67. | obscure | not clear or obvious |
| 68. | odd | different in a puzzling way |
| 69. | offbeat | unconventional and puzzling |
| 70. | opaque | not easy to understand |
| 71. | paradoxical | seemingly contradictory yet possible |
| 72. | puzzling | difficult to make sense of |
| 73. | queer | odd and puzzling |
| 74. | quirky | odd in a puzzling way |
| 75. | recondite | little known and difficult |
| 76. | rough | difficult and confusing |
| 77. | roundabout | indirect and confusingly long |
| 78. | scrambled | disordered and confusing |
| 79. | senseless | without understandable meaning |
| 80. | slippery | hard to grasp clearly |
| 81. | snarled | knotted into confusion |
| 82. | strange | unusual and hard to explain |
| 83. | surreal | strangely unreal and confusing |
| 84. | tangled | twisted into confusion |
| 85. | taxing | requiring much mental effort |
| 86. | thorny | difficult and complicated |
| 87. | tricky | difficult in a confusing way |
| 88. | trying | difficult and mentally taxing |
| 89. | twisted | distorted into confusing form |
| 90. | uncanny | strangely unsettling or puzzling |
| 91. | unclear | not easy to understand |
| 92. | undecipherable | not able to be deciphered |
| 93. | unexpected | not anticipated and puzzling |
| 94. | unfathomable | too deep to understand |
| 95. | unintelligible | not understandable |
| 96. | unreadable | too unclear to read |
| 97. | veiled | partly hidden from understanding |
| 98. | vexing | annoyingly difficult to understand |
| 99. | weird | strangely hard to understand |
| 100. | wild | strangely confusing or extreme |