| hardhearted(adjective, mean, severe, harsh, cruel) |
| harsh(adjective, mean, severe, cruel, pitiless) |
| hatchet job(expression, adjective, mean, severe, harsh) |
| having a killer instinct(expression, adjective, idiom, mean, severe) |
| illegal(unreasonable, improper, excessive, unwarranted, prejudiced) |
| illegitimate(adjective, unreasonable, extreme, improper, stiff) |
| implacable(adjective, mean, severe, harsh, cruel) |
| inaccurate(wrong, false, awkward, unsuitable, unfitting) |
| inadmissible(wrong, false, awkward, inadequate, inappropriate) |
| incompatible(inappropriate, unbecoming, unfitting) |
| incongruous(wrong, offensive, rude, false, awkward) |
| inconsequential |
| inconsiderate |
| incorrect(wrong, false, awkward, unsuitable, unfitting) |
| indefensible(adjective, senseless, unwarranted, wanton, unjust) |
| indelicate |
| independent |
| inequitable(unreasonable, improper, unwarranted, prejudiced, iniquitous) |
| inexcusable(adjective, unreasonable, improper, unwarranted, iniquitous) |
| inexorable(adjective, mean, severe, harsh, cruel) |