| gruesome(adjective, appearance, terrible, hopeless) |
| horrible(adjective, strong, violent, terrible, shocking) |
| hostile(adjective, mean, sharp, harsh, ill) |
| ill-mannered(adjective, discourteous) |
| impertinent(adjective, discourteous) |
| improper(adjective, rough, offensive, rude, foolish) |
| in bad taste(expression, adjective, idiom, offensive, vulgar) |
| inconsiderate(adjective, mean, ill, hostile, unfriendly) |
| indecorous(adjective, rough, offensive, rude, foolish) |
| indifferent(adjective, mean, hard, harsh, cold) |
| inexorable(adjective, appearance, mean, hard, tough) |
| infernal |
| inflexible(adjective, terrible behavior) |
| intense(adjective, strong, violent, wicked, brutal) |
| loathsome(adjective, adverb, low, base, coarse) |
| low(adjective, adverb, offensive, rude, base) |
| malicious(adjective, animal, mean, evil, nasty) |
| malign(adjective, animal, mean, strong, severe) |
| malignant(adjective, animal, mean, cruel, vicious) |
| nefarious(adjective, evil, terrible, cruel, wicked) |