Negative Words that Start with I: Complete List

In this article, you’ll find a comprehensive list of negative words that start with the letter I to help you expand your vocabulary.

1. Ignorant- Lacking knowledge or awareness.
2. Illiterate- Unable to read or write.
3. Illegal- Contrary to or forbidden by law.
4. Immoral- Not conforming to accepted standards of morality.
5. Impolite- Not having or showing good manners.
6. Imperfect- Not perfect; flawed.
7. Impatient- Unable to wait; restless.
8. Inconsiderate- Thoughtless; not thinking of others.
9. Inept- Not skilled; clumsy.
10. Inaccurate- Not correct; erroneous.
11. Insincere- Not expressing genuine feelings.
12. Inactive- Not active; idle.
13. Indecisive- Unable to make decisions.
14. Indifferent- Unconcerned; apathetic.
15. Inferior- Lower in rank, status, or quality.
16. Insulting- Disrespectful or scornful.
17. Intoxicated- Drunk; under the influence of alcohol.
18. Irrational- Not logical or reasonable.
19. Irresponsible- Not showing a proper sense of responsibility.
20. Irrelevant- Not connected with the matter at hand.
21. Irritable- Easily annoyed or angered.
22. Insecure- Lacking confidence; unsure of oneself.
23. Indignant- Feeling or showing anger at unfair treatment.
24. Inefficient- Not achieving maximum productivity.
25. Infamous- Well known for a bad quality or deed.
26. Inhospitable- Not welcoming or friendly.
27. Incompetent- Not having the necessary skills.
28. Incoherent- Not clear or easy to understand.
29. Impoverished- Poor; lacking sufficient resources.
30. Impractical- Not sensible or realistic.
31. Inappropriate- Not suitable or proper.
32. Intrusive- Causing disruption or annoyance by being unwelcome.
33. Impulsive- Acting without thought or planning.
34. Inflammatory- Causing anger or strong emotions.
35. Inconsistent- Not staying the same throughout.
36. Infectious- Likely to spread or influence others negatively.
37. Inflexible- Not willing to change or compromise.
38. Inexcusable- Too bad to be justified or tolerated.
39. Insensitive- Not feeling or showing concern for others.
40. Instinctual- Acting on basic instincts, often negatively.
41. Interruptive- Causing disruption or interruption.
42. Intolerable- Too bad or harsh to be tolerated.
43. Invincible- Unable to be defeated, often used negatively for arrogance.
44. Irradiated- Exposed to radiation, often harmful.
45. Irreparable- Impossible to repair or remedy.
46. Irresistible- Too attractive to be resisted, can also mean overpowering in a negative sense.
47. Itchy- Causing an uncomfortable sensation.
48. Incapable- Not able to do something.
49. Invisible- Unable to be seen; unnoticed.
50. Inhuman- Lacking human qualities.
51. Incautious- Careless; lacking caution.
52. Indolent- Lazy; avoiding activity.
53. Incriminating- Making someone appear guilty.
54. Indebted- Owing money or gratitude.
55. Imperious- Assuming power without justification.
56. Incensed- Very angry; enraged.
57. Incomplete- Not fully finished or developed.
58. Infernal- Related to hell; very bad or unpleasant.
59. Inclement- Severe (usually weather).
60. Intractable- Hard to control or deal with.
61. Indistinct- Not clear or sharply defined.
62. Irksome- Annoying; irritating.
63. Infuriating- Causing anger or frustration.
64. Incorruptible- Inreverting or changing in a negative manner.
65. Immobile- Unable to move or be moved.
66. Insolvent- Unable to pay debts.
67. Ignoble- Not honorable in character or purpose.
68. Irregular- Not following a pattern.
69. Invidious- Likely to cause resentment or anger.
70. Impassive- Not showing emotion.
71. Inelastic- Not flexible; unyielding.
72. Incendiary- Designed to cause fires; likely to cause conflict.
73. Inauspicious- Not conducive to success; unpromising.
74. Invalid- Not valid or legally recognized.
75. Insuperable- Impossible to overcome.
76. Inhumane- Without compassion for misery or suffering.
77. Infertile- Incapable of reproducing.
78. Inoperative- Not working or functioning.
79. Infest- Be present in large numbers, typically so as to cause damage.
80. Insolent- Showing a rude and arrogant lack of respect.
81. Inert- Lacking the ability or strength to move.
82. Inequitable- Unfair; unjust.
83. Invulnerable- Impossible to harm or damage.
84. Infectious- Spreading disease or influence.
85. Insidious- Proceeding in a subtle way with harmful effects.
86. Imminent- About to happen, often with negative connotation.
87. Injudicious- Showing poor judgment.
88. Impiety- Lack of reverence, especially for a god.
89. Imperceptible- Impossible to perceive.
90. Inferior- Lower in quality.
91. Inhumane- Without compassion for suffering.
92. Irrational- Not logical.
93. Imperceptive- Lacking awareness.
94. Intractable- Hard to control.
95. Inquisitive- In a prying manner.
96. Insolent- Disrespectful.
97. Imprudent- Not showing care for consequences.
98. Infect- To contaminate with disease.
99. Impugn- To call into question.
100. Incise- Cut into, often in a negative medical sense.