| No. | Term | Definition |
|---|---|---|
| 1. | —a bad idea | Likely to cause negative outcomes. |
| 2. | —not advisable | Should be avoided; risky. |
| 3. | —not in your interests | Likely to disadvantage you. |
| 4. | —playing with fire | Taking a dangerously risky course. |
| 5. | Abusive | Cruel or violent in treatment. |
| 6. | Adverse | Unfavorable; likely to cause problems. |
| 7. | Aggravating | Making a problem worse. |
| 8. | Aging | Causing deterioration over time. |
| 9. | Alarmingly risky | Dangerously uncertain or unsafe. |
| 10. | Atrophying | Causing weakening or wasting away. |
| 11. | Bad for you | Likely to damage health. |
| 12. | Baleful | Threatening harm; ominous. |
| 13. | Baneful | Causing harm; destructive. |
| 14. | Biting | Sharp and wounding in effect. |
| 15. | Brutalizing | Making someone cruel or numb. |
| 16. | Cancer-causing | Capable of causing cancer. |
| 17. | Caustic | Burning or corrosively sarcastic. |
| 18. | Corrosive | Gradually eating away or eroding. |
| 19. | Counterproductive | Undermining the intended result. |
| 20. | Damaging | Causing injury or loss. |
| 21. | Dangerous | Likely to cause injury or loss. |
| 22. | Deadly | Causing or capable of causing death. |
| 23. | Debilitating | Weakening; reducing strength. |
| 24. | Deleterious | Causing harm or damage. |
| 25. | Demoralizing | Destroying confidence or morale. |
| 26. | Destructive | Causing serious damage or ruin. |
| 27. | Detrimental | Tending to cause harm. |
| 28. | Devastating | Causing overwhelming damage. |
| 29. | Disabling | Preventing normal function. |
| 30. | Disruptive | Causing disorder or interruption. |
| 31. | Disturbing | Causing anxiety or unease. |
| 32. | Draining | Exhausting energy or resources. |
| 33. | Eroding | Gradually wearing away. |
| 34. | Evil | Morally wrong; injurious. |
| 35. | Exploitive | Taking unfair advantage; damaging. |
| 36. | Fatal | Causing death; disastrous. |
| 37. | Flammable | Easily set on fire. |
| 38. | Foul | Offensive; dirty or corrupting. |
| 39. | Fracturing | Splitting or breaking apart. |
| 40. | Galling | Irritating and damaging to pride. |
| 41. | Grievous | Very serious; severe. |
| 42. | Grim | Bleak; causing fear or worry. |
| 43. | Grossly unsafe | Extremely unsafe; high risk. |
| 44. | Hazardous | Risky; likely to cause harm. |
| 45. | Health-damaging | Bad for physical well-being. |
| 46. | High-risk | Likely to cause serious loss. |
| 47. | Hurtful | Causing emotional pain. |
| 48. | Inappropriate | Unsuitable; potentially damaging. |
| 49. | Injurious | Causing injury or harm. |
| 50. | Insidious | Gradually harmful, hard to detect. |
| 51. | Irritating | Annoying; causing discomfort. |
| 52. | Jarring | Harshly unsettling; discordant. |
| 53. | Jeopardizing | Putting at risk. |
| 54. | Jolting | Suddenly upsetting or disruptive. |
| 55. | Killer | Causing death; extremely dangerous. |
| 56. | Knock-on damaging | Causing further negative effects. |
| 57. | Lacerating | Tearing; causing deep injury. |
| 58. | Lethal | Sufficient to cause death. |
| 59. | Life-threatening | Endangering life. |
| 60. | Maiming | Causing permanent injury. |
| 61. | Maleficent | Causing evil or harm. |
| 62. | Malicious | Intending to cause damage. |
| 63. | Malignant | Dangerous; worsening; cancerous. |
| 64. | Menacing | Threatening danger. |
| 65. | Misleading | Causing wrong beliefs or choices. |
| 66. | Noxious | Harmful; poisonous or unpleasant. |
| 67. | Nullifying | Canceling out beneficial effects. |
| 68. | Obnoxious | Highly unpleasant; offensive. |
| 69. | Offensive | Causing anger or disgust. |
| 70. | Oppressive | Harshly restrictive; damaging. |
| 71. | Perilous | Full of danger. |
| 72. | Poisonous | Containing or causing poison. |
| 73. | Polluting | Contaminating; making unclean. |
| 74. | Prejudicial | Causing disadvantage or bias. |
| 75. | Problematic | Likely to cause difficulties. |
| 76. | Punishing | Excessively harsh or damaging. |
| 77. | Ravaging | Causing severe destruction. |
| 78. | Risky | Involving danger or uncertainty. |
| 79. | Ruinous | Leading to ruin or collapse. |
| 80. | Sabotaging | Deliberately undermining success. |
| 81. | Scarring | Leaving lasting damage or trauma. |
| 82. | Self-defeating | Working against oneself. |
| 83. | Shattering | Breaking apart; deeply upsetting. |
| 84. | Sickening | Causing nausea or disgust. |
| 85. | Sinister | Suggesting evil or harm. |
| 86. | Souring | Turning unpleasant or hostile. |
| 87. | Tainting | Contaminating; spoiling purity. |
| 88. | Toxic | Poisonous; severely damaging. |
| 89. | Traumatizing | Causing lasting psychological distress. |
| 90. | Treacherous | Deceptively dangerous. |
| 91. | Troublesome | Causing problems or annoyance. |
| 92. | Undermining | Weakening gradually or secretly. |
| 93. | Unhealthy | Bad for health. |
| 94. | Unsafe | Not protected from danger. |
| 95. | Unsound | Flawed; not reliable or safe. |
| 96. | Unstable | Likely to fail or collapse. |
| 97. | Unwholesome | Not healthful; morally tainted. |
| 98. | Virulent | Extremely severe or poisonous. |
| 99. | Volatile | Unstable; liable to explode. |
| 100. | Wounding | Causing injury or deep hurt. |
