| inhuman(adjective, mean, hard, harsh, cold) |
| objective(adjective, insensitive) |
| passive(adjective, insensitive) |
| thick-skinned(adjective, hard, careless, indifferent, cruel) |
| uncharitable(adjective, person, feelings) |
| unconcerned(adjective, hard, careless, indifferent, cruel) |
| uncongenial(adjective, coldhearted) |
| blunt(adjective, insensitive) |
| brutish(adjective, hard, cold, cruel, unfeeling) |
| case-hardened(adjective, hard, careless, indifferent, cruel) |
| coldblooded(adjective, mean, hard, harsh, cold) |
| hard-hearted(adjective, cold, cruel, unfeeling, unsympathetic) |
| harsh(adjective, mean, hard, severe, cold) |
| hellish(adjective, pitiless) |
| horny |
| impervious(adjective, unfeeling, unresponsive, insensible, oblivious) |
| indurated(adjective, hard, careless, indifferent, cruel) |
| inexorable(adjective, mean, hard, severe, harsh) |
| inhospitable(adjective, unfriendly, unemotional, emotionless, taciturn) |
| insensate(adjective, hard, careless, indifferent, cruel) |