| heartless(adjective, person, feeling, hard, tough) |
| callous(adjective, hard, tough, severe, attitude) |
| unfeeling(adjective, person, cool, attitude, cold) |
| cold(adjective, person, hard, tough, severe) |
| cruel(adjective, person, hard, tough, severe) |
| frigid(adjective, person, hard, cool, cold) |
| insensitive(adjective, person, hard, tough, severe) |
| uncaring(adjective, person, hard, tough, severe) |
| unsympathetic(adjective, person, hard, tough, severe) |
| hard(adjective, person, tough, severe, attitude) |
| hard-hearted(adjective, person, hard, tough, severe) |
| aloof(adjective, person, cool, cold, feelings) |
| detached(adjective, person, feelings, cruel, unfeeling) |
| unfriendly(adjective, person, cold, feelings, cruel) |
| indifferent(adjective, person, cool, cold, feelings) |
| cold-blooded(adjective, hard, tough, severe, attitude) |
| apathetic(adjective, hard, tough, severe, cold) |
| emotionless(adjective, bad behavior, aroused negative) |
| icy(adjective, hard, tough, severe, cold) |
| cool(adjective, cold, detached, unfriendly, stiff) |