| cold-blooded(adjective, hard, cool, tough, severe) |
| impervious(noun, adjective, calm, restrained, detached) |
| insensible(adjective, hard, tough, severe, careless) |
| unemotional(adjective, mean, hard, cool, tough) |
| case-hardened(noun, adjective, hard, careless, indifferent) |
| cold-hearted(adjective, hard, tough, severe, cruel) |
| frigid(adjective, cool, detached, blank, sober) |
| insensate(noun, adjective, hard, tough, severe) |
| numb(noun, adjective, hard, tough, severe) |
| stolid |
| toughened(noun, adjective, hard, careless, indifferent) |
| uncaring(adjective, hard, tough, severe, careless) |
| unsusceptible(noun, adjective, hard, careless, indifferent) |
| benumbed(adjective, hard, tough, severe, cruel) |
| coldhearted(adjective, hard, indifferent, detached, unfeeling) |
| dead |
| dispassionate(adjective, calm, cool, indifferent, restrained) |
| emotionless(adjective, detached, blank, unfeeling, impassive) |
| hardhearted(adjective, hard, careless, indifferent, cruel) |
| impassive(adjective, calm, hard, cool, careless) |