| No. | Item | Definition |
|---|---|---|
| 1. | adverse | harmful or unfavorable |
| 2. | aggravating | making a problem or feeling worse |
| 3. | annoying | causing irritation or displeasure |
| 4. | arduous | requiring great effort or endurance |
| 5. | bleak | offering little hope or comfort |
| 6. | blocking | preventing movement or progress |
| 7. | bothersome | causing trouble or annoyance |
| 8. | brutal | extremely difficult or unpleasant |
| 9. | burdensome | difficult to carry or manage |
| 10. | challenging | requiring effort and determination |
| 11. | constraining | limiting or holding back |
| 12. | counterproductive | having the opposite desired effect |
| 13. | deflating | reducing enthusiasm or confidence |
| 14. | demanding | requiring much effort or attention |
| 15. | demoralizing | reducing morale or confidence |
| 16. | difficult | hard to deal with |
| 17. | disagreeable | unpleasant or annoying |
| 18. | discouraging | making someone lose confidence |
| 19. | disheartening | causing loss of confidence or hope |
| 20. | dispiriting | causing low spirits or discouragement |
| 21. | displeasing | not pleasant or satisfying |
| 22. | distressing | causing worry, sadness, or pain |
| 23. | enervating | draining energy or strength |
| 24. | exacting | requiring great care and effort |
| 25. | exasperating | extremely annoying or provoking |
| 26. | exhausting | making someone very tired |
| 27. | fatiguing | causing tiredness |
| 28. | formidable | impressively difficult to overcome |
| 29. | fruitless | producing no useful result |
| 30. | futile | pointless because unlikely to succeed |
| 31. | galling | annoying because unfair or insulting |
| 32. | grating | harshly irritating or annoying |
| 33. | grim | unpleasant, difficult, and discouraging |
| 34. | grueling | extremely tiring and demanding |
| 35. | gruelling | extremely tiring and demanding |
| 36. | hampering | making progress more difficult |
| 37. | hard | difficult to do or bear |
| 38. | heavy-going | difficult and slow to deal with |
| 39. | high-pressure | involving intense stress or demands |
| 40. | hindering | slowing or blocking progress |
| 41. | hopeless | offering no chance of success |
| 42. | impractical | not sensible or workable |
| 43. | ineffective | not producing the desired result |
| 44. | ineffectual | not producing the intended effect |
| 45. | infuriating | causing intense anger or frustration |
| 46. | insoluble | impossible to solve |
| 47. | intractable | hard to control or solve |
| 48. | irkful | causing annoyance or weariness |
| 49. | irksome | annoying in a persistent way |
| 50. | irritating | causing annoyance or impatience |
| 51. | laborious | requiring much hard work |
| 52. | limiting | restricting what is possible |
| 53. | maddening | making someone very angry |
| 54. | mystifying | very hard to explain or understand |
| 55. | nerve-racking | causing extreme anxiety or tension |
| 56. | nerve-wracking | causing extreme anxiety or tension |
| 57. | nettlesome | annoying and difficult to handle |
| 58. | no-win | offering no satisfactory outcome |
| 59. | objectionable | unpleasant or unacceptable |
| 60. | obstinate | stubbornly resistant to change |
| 61. | obstructive | blocking progress or action |
| 62. | off-putting | discouraging or unpleasant |
| 63. | offensive | causing displeasure or resentment |
| 64. | onerous | burdensome and difficult |
| 65. | overwhelming | too much to handle |
| 66. | painstaking | requiring careful, tiring effort |
| 67. | pestering | annoying through repeated bother |
| 68. | pointless | having no useful purpose |
| 69. | pressured | involving stress or urgency |
| 70. | problematic | presenting difficulties or complications |
| 71. | provoking | causing anger or irritation |
| 72. | rankling | causing lingering resentment or annoyance |
| 73. | recalcitrant | stubbornly refusing to cooperate |
| 74. | restrictive | limiting freedom or progress |
| 75. | rigorous | demanding strict effort or precision |
| 76. | riling | making someone annoyed or angry |
| 77. | rough | difficult or unpleasant |
| 78. | sapping | gradually draining energy or strength |
| 79. | slowing | reducing speed or progress |
| 80. | stalling | causing delay or lack of progress |
| 81. | strenuous | requiring great physical or mental effort |
| 82. | stressful | causing mental pressure or strain |
| 83. | stubborn | difficult to change or move |
| 84. | taxing | demanding great effort or patience |
| 85. | testing | straining patience or ability |
| 86. | thankless | unappreciated and unrewarding |
| 87. | tiresome | annoying, dull, or exhausting |
| 88. | troublesome | causing difficulty or problems |
| 89. | trying | difficult and patience-testing |
| 90. | undesirable | not wanted or pleasing |
| 91. | unpleasant | causing discomfort or dislike |
| 92. | unrewarding | not worth the effort made |
| 93. | unsatisfying | not giving satisfaction or fulfillment |
| 94. | unwelcome | not wanted or appreciated |
| 95. | upsetting | causing distress or disturbance |
| 96. | vain | producing no desired result |
| 97. | vexing | causing worry, irritation, or distress |
| 98. | wearing | gradually tiring or irritating |
| 99. | wearisome | tiring because tedious or difficult |
| 100. | wearying | making someone tired or bored |
