| inanimate(adjective, hard, tough, severe, cold) |
| indurate(adjective, bad, cold, aloof, no feelings) |
| insentient(adjective, bad, cold, aloof, no feelings) |
| irresponsive(adjective, bad, cold, aloof, no feelings) |
| marble(adjective, bad, cold, aloof, no feelings) |
| marble-hearted(adjective, bad, cold, aloof, no feelings) |
| merciless(adjective, hard, tough, severe, cold) |
| numb(adjective, hard, tough, severe, cold) |
| obdurate(adjective, hard, tough, severe, cold) |
| pitiless(adjective, hard, tough, severe, cold) |
| ruthless(adjective, hard, tough, severe, cold) |
| sensationless(adjective, hard, tough, severe, cold) |
| severe(adjective, hard, tough, cold, cruel) |
| stockish(adjective, bad, cold, aloof, no feelings) |
| stony(adjective, hard, tough, severe, cruel) |
| surly(adjective, hard, tough, severe, cold) |
| tearless(adjective, bad, cold, aloof, no feelings) |
| thick-skinned(adjective, hard, tough, severe, cruel) |
| tough(adjective, hard, severe, cruel, unsympathetic) |
| unalive(adjective, bad, cold, aloof, no feelings) |