| No. | Term | Definition |
|---|---|---|
| 1. | Achy | Causing physical discomfort or soreness. |
| 2. | Adverse | Unfavorable; likely to cause harm. |
| 3. | Aggravating | Annoying; making something worse. |
| 4. | Arduous | Requiring great effort; strenuous. |
| 5. | Austere | Severe; lacking comfort or ease. |
| 6. | Backbreaking | Extremely physically demanding. |
| 7. | Baleful | Threatening harm; ominous. |
| 8. | Burdensome | Hard to carry; onerous. |
| 9. | Byzantine | Overly complex; labyrinthine. |
| 10. | Catch-22 | No-win situation; self-contradicting rules. |
| 11. | Complicated | Difficult due to many parts. |
| 12. | Convoluted | Twistingly complex; hard to follow. |
| 13. | Crucial | Demanding careful attention; pivotal. |
| 14. | Daunting | Intimidating; discouraging to attempt. |
| 15. | Demanding | Requiring much effort or skill. |
| 16. | Dire | Extremely serious; urgent. |
| 17. | Distressing | Causing anxiety, sorrow, or pain. |
| 18. | Draining | Exhausting; sapping energy. |
| 19. | Dreadful | Causing fear or great dislike. |
| 20. | Dutiful | Requiring conscientious effort and care. |
| 21. | Exacting | Requiring precision and high standards. |
| 22. | Exasperating | Irritating; provoking frustration. |
| 23. | Exhausting | Very tiring; depleting strength. |
| 24. | Expensive | Costly; hard on a budget. |
| 25. | Fateful | Having serious, lasting consequences. |
| 26. | Fiddly | Tricky; requiring careful small work. |
| 27. | Formidable | Inspiring respect; hard to overcome. |
| 28. | Fraught | Filled with tension or problems. |
| 29. | Frustrating | Preventing success; causing annoyance. |
| 30. | Grave | Serious; weighty in importance. |
| 31. | Grueling | Extremely tiring and demanding. |
| 32. | Harassing | Persistently troubling or pressuring. |
| 33. | Hard | Not easy; requiring effort. |
| 34. | Harsh | Severe; unpleasantly rough. |
| 35. | Hectic | Very busy; full of pressure. |
| 36. | Herculean | Requiring enormous strength or effort. |
| 37. | High-stakes | With serious consequences for failure. |
| 38. | Imposing | Intimidating by size or seriousness. |
| 39. | Inconvenient | Causing trouble; not suitable. |
| 40. | Intricate | Detailed and complex; hard to grasp. |
| 41. | Irritating | Annoying; provoking impatience. |
| 42. | Jagged | Rough; uneven and hard to navigate. |
| 43. | Jarring | Unsettling; unpleasantly abrupt. |
| 44. | Jeopardous | Risky; exposing to danger. |
| 45. | Jittery | Nervous; uneasy under pressure. |
| 46. | Laborious | Taking much time and effort. |
| 47. | Labyrinthine | Like a maze; confusingly complex. |
| 48. | Loaded | Full of implications; hard to handle. |
| 49. | Long-winded | Overly lengthy; hard to sit through. |
| 50. | Lopsided | Imbalanced; awkward to manage. |
| 51. | Menacing | Threatening; suggesting danger. |
| 52. | Messy | Disordered; difficult to sort out. |
| 53. | Mind-bending | Very difficult to understand. |
| 54. | Nerve-racking | Causing anxiety; stressful. |
| 55. | No-win | Impossible to succeed in. |
| 56. | Noteworthy | Requiring attention; significant. |
| 57. | On thin ice | In a risky, unstable situation. |
| 58. | Onerous | Burdensome; oppressively difficult. |
| 59. | Oppressive | Heavy; causing discomfort or stress. |
| 60. | Ordeal-like | Like an ordeal; severely trying. |
| 61. | Painful | Causing physical or emotional hurt. |
| 62. | Perilous | Dangerous; full of risk. |
| 63. | Perplexing | Confusing; hard to understand. |
| 64. | Pesky | Annoyingly troublesome; bothersome. |
| 65. | Precarious | Unstable; likely to go wrong. |
| 66. | Pressing | Urgent; requiring immediate action. |
| 67. | Problematic | Causing problems; difficult to resolve. |
| 68. | Punishing | Harshly difficult; very demanding. |
| 69. | Risky | Involving danger; uncertain outcome. |
| 70. | Rocky | Full of obstacles; unstable progress. |
| 71. | Rough | Difficult; not smooth or easy. |
| 72. | Sapping | Draining strength or motivation. |
| 73. | Severe | Very intense; harsh or strict. |
| 74. | Shaky | Uncertain; unstable and unreliable. |
| 75. | Sobering | Making one serious; hard to accept. |
| 76. | Sophisticated | Complex; requiring advanced understanding. |
| 77. | Sticky | Tricky situation; hard to resolve. |
| 78. | Strained | Under tension; difficult to sustain. |
| 79. | Strenuous | Requiring great physical effort. |
| 80. | Stressful | Causing mental strain or pressure. |
| 81. | Stubborn | Hard to change; resistant. |
| 82. | Tangled | Complicated; difficult to untangle. |
| 83. | Taxing | Demanding; tiring to do. |
| 84. | Tedious | Long and boring; hard to endure. |
| 85. | Tense | Nervous; filled with strain. |
| 86. | Testing | Putting abilities or patience to trial. |
| 87. | Thorny | Full of difficulties; tricky. |
| 88. | Tough | Hard to do or deal with. |
| 89. | Trying | Difficult; requiring patience. |
| 90. | Uncomfortable | Causing unease; not pleasant. |
| 91. | Uneasy | Anxious; not at rest. |
| 92. | Unforgiving | Harsh; allowing little margin for error. |
| 93. | Unpleasant | Not enjoyable; hard to tolerate. |
| 94. | Unwieldy | Hard to handle; awkwardly large. |
| 95. | Uphill | Requiring extra effort to progress. |
| 96. | Vexing | Annoying; causing frustration. |
| 97. | Wearing | Tiring over time; exhausting. |
| 98. | Weighty | Serious; important and demanding. |
| 99. | Worrisome | Causing concern; troubling. |
| 100. | Wrangly | Hard to manage; requires effort. |