| undiplomatic(adjective, sharp, rough, rude, careless) |
| undiscerning(adjective, dull, careless, indifferent, thoughtless) |
| unmerciful(adjective, hard, tough, harsh, cruel) |
| unselective(adjective, indiscreet) |
| barbaric |
| boorish(adjective, dull, sharp, rough, low) |
| case-hardened(noun, adjective, hard, careless, indifferent) |
| coarse |
| crass(adjective, dull, hard, rough, low) |
| dazed(adjective, unfeeling, numb, under, asleep) |
| desensitized(adjective, numb) |
| disinterested(adjective, mean, hard, cool, temper) |
| distant(adjective, indifferent, unsympathetic, inattentive, uninterested) |
| doltish(dull, slow, stupid, vulgar, thoughtless) |
| dull-witted |
| impenitent(adjective, hard, tough, harsh, careless) |
| imprudent(adjective, sharp, rough, careless, thoughtless) |
| incurious(adjective, hard, indifferent, unfeeling, unsympathetic) |
| indurate(adjective, bad, cold, aloof, no feelings) |
| lackadaisical(adjective, temper, cold, indifferent, negative) |