| blunt(adjective, thoughtless, insensitive, crass, tactless) |
| brutish(adjective, hard, cold, indifferent, unfeeling) |
| closed |
| dog-eat-dog(adjective, mean, hard, severe, harsh) |
| firm(noun, adjective, mean, hard, severe) |
| frosty(adjective, cool, aloof, distant, lukewarm) |
| impassible(adjective, quiet, bad, cold, aloof) |
| impervious(adjective, bad, cold, indifferent, detached) |
| incompatible |
| inured(adjective, hard, careless, indifferent, cruel) |
| loathsome |
| nonchalant(adjective, indifferent, detached, distant, apathetic) |
| numb(adjective, dull, quiet, hard, tough) |
| objective(adjective, indifferent, detached, distant, apathetic) |
| passionless(adjective, dull, quiet, cool, flat) |
| repellent(adjective, mean, hard, cool, cold) |
| sadistic(adjective, person, mean, harsh, cruel) |
| soulless(adjective, hard, careless, indifferent, cruel) |
| spiritless(adjective, dull, quiet, hard, cool) |
| stonyhearted(adjective, person, feelings, emotions) |