| callous(adjective, hard, tough, severe) |
| insensible(adjective, hard, tough, severe) |
| cold-blooded(adjective, hard, tough, severe) |
| hard-hearted(adjective, hard, tough, severe) |
| inhuman(adjective, hard, tough, severe) |
| insensate(adjective, hard, tough, severe) |
| insensitive(adjective, hard, tough, severe) |
| senseless(adjective, hard, tough, severe) |
| unfeeling(adjective, cold, cruel, aloof) |
| unkind(adjective, hard, tough, severe) |
| unsympathetic(adjective, hard, tough, severe) |
| emotionless(adjective, cold, aloof, no feelings) |
| uncaring(adjective, hard, tough, severe) |
| as cold as charity(adjective, cold, aloof, no feelings) |
| brute(adjective, cold, aloof, no feelings) |
| chill(adjective, cold, aloof, no feelings) |
| dead-hearted(adjective, cold, aloof, no feelings) |
| dead-pan(adjective, cold, aloof, no feelings) |
| hard-boiled(adjective, cold, aloof, no feelings) |
| impassible(adjective, cold, aloof, no feelings) |