| No. | Item | Definition |
|---|---|---|
| 1. | all-consuming | taking all energy and attention |
| 2. | arduous | difficult and tiring |
| 3. | backbreaking | extremely physically demanding |
| 4. | bone-tiring | tiring to the bones |
| 5. | boring | dull and wearying |
| 6. | brain-draining | mentally tiring |
| 7. | brutal | harsh and exhausting |
| 8. | burdensome | heavy to bear |
| 9. | challenging | requiring effort and skill |
| 10. | complicated | difficult and tiring |
| 11. | crippling | severely weakening |
| 12. | crushing | overwhelmingly demanding |
| 13. | cumbersome | awkward and tiring |
| 14. | debilitating | weakening and draining |
| 15. | demanding | requiring great effort |
| 16. | demoralizing | discouraging and draining |
| 17. | devitalizing | taking away vitality |
| 18. | difficult | hard to do |
| 19. | dispiriting | lowering spirits and energy |
| 20. | distressing | upsetting and tiring |
| 21. | draining | using up energy |
| 22. | emotionally draining | tiring the emotions |
| 23. | emotionally taxing | demanding emotional effort |
| 24. | emotionally wearing | gradually tiring emotionally |
| 25. | energy-draining | using up energy |
| 26. | energy-sapping | draining one’s energy |
| 27. | enervating | sapping energy |
| 28. | exacting | requiring great care and effort |
| 29. | fatiguing | causing fatigue |
| 30. | ferocious | intensely demanding |
| 31. | fiddly | awkwardly detailed and tiring |
| 32. | fierce | intensely difficult |
| 33. | finicky | requiring tiring attention |
| 34. | frustrating | annoying and draining |
| 35. | grinding | relentlessly hard and tiring |
| 36. | grueling | extremely tiring |
| 37. | hard | requiring much effort |
| 38. | harrowing | distressing and draining |
| 39. | harsh | unpleasantly demanding |
| 40. | heavy | difficult and tiring |
| 41. | high-pressure | stressful and demanding |
| 42. | humdrum | dull and wearisome |
| 43. | intense | extremely demanding |
| 44. | intensive | highly concentrated and demanding |
| 45. | intricate | requiring tiring attention |
| 46. | irksome | annoying and tiring |
| 47. | killer | extremely tiring |
| 48. | labor-intensive | requiring much labor |
| 49. | laborious | requiring hard work |
| 50. | life-sapping | draining vitality |
| 51. | lung-busting | requiring intense exertion |
| 52. | marathon | very long and demanding |
| 53. | mentally draining | tiring the mind |
| 54. | mentally taxing | demanding mental effort |
| 55. | mentally wearing | gradually tiring mentally |
| 56. | mind-numbing | tedious and mentally tiring |
| 57. | murderous | extremely difficult and tiring |
| 58. | nerve-racking | stressful and draining |
| 59. | nerve-wracking | stressful and draining |
| 60. | nonstop | without rest or pause |
| 61. | onerous | burdensome and demanding |
| 62. | oppressive | weighing heavily |
| 63. | overwhelming | too much to handle |
| 64. | painstaking | requiring careful effort |
| 65. | physically draining | tiring the body |
| 66. | physically taxing | demanding physical effort |
| 67. | physically wearing | gradually tiring physically |
| 68. | plodding | slow and tiring |
| 69. | punishing | severely demanding |
| 70. | relentless | unceasingly demanding |
| 71. | repetitious | too repetitive and tiring |
| 72. | repetitive | repeated enough to tire |
| 73. | rigorous | strictly demanding |
| 74. | rough | difficult and tiring |
| 75. | round-the-clock | continuous and tiring |
| 76. | sapping | gradually draining strength |
| 77. | savage | brutally demanding |
| 78. | severe | very hard to endure |
| 79. | soul-sapping | deeply draining |
| 80. | spirit-sapping | draining enthusiasm and energy |
| 81. | strength-sapping | draining physical strength |
| 82. | strenuous | requiring intense effort |
| 83. | stressful | causing stress and tiredness |
| 84. | taxing | demanding much effort |
| 85. | testing | severely challenging |
| 86. | tiring | causing tiredness |
| 87. | toilsome | requiring tiring labor |
| 88. | tough | difficult and demanding |
| 89. | trying | difficult to endure |
| 90. | unrelenting | constantly demanding |
| 91. | unwieldy | awkward and demanding |
| 92. | uphill | difficult and tiring |
| 93. | vexing | annoying and tiring |
| 94. | vitality-sapping | draining life and energy |
| 95. | weakening | reducing strength |
| 96. | wearing | gradually tiring |
| 97. | wearisome | tiring and tedious |
| 98. | wearying | making someone weary |
| 99. | work-heavy | involving much work |
| 100. | work-intensive | requiring much work |
