| asleep(adjective, hard, tough, severe, cold) |
| aloof(adjective, hard, indifferent, unfeeling, unkind) |
| anesthetized(adjective, hard, tough, severe, cold) |
| cold-blooded(adjective, hard, tough, severe, cold) |
| insensitive(adjective, hard, tough, severe, cold) |
| apathetic(adjective, hard, tough, severe, cold) |
| benumbed(adjective, hard, tough, severe, cold) |
| bloodless(adjective, hard, indifferent, unkind, unresponsive) |
| brutal(adjective, hard, tough, severe, cold) |
| callous(adjective, hard, tough, severe, indifferent) |
| cantankerous(adjective, hard, tough, severe, cold) |
| churlish(adjective, hard, tough, severe, cold) |
| cold(adjective, hard, tough, severe, cruel) |
| cold-hearted(adjective, hard, tough, severe, cold) |
| cold fish(expression, adjective, hard, tough, severe) |
| coldhearted(adjective, hard, indifferent, unfeeling, unkind) |
| crotchety(adjective, hard, tough, severe, cold) |
| cruel(adjective, hard, tough, severe, cold) |
| deadened(adjective, hard, tough, severe, cold) |
| exacting(adjective, hard, tough, severe, cold) |