| callous(adjective, calm, mean, bad, hard) |
| cruel(adjective, person, mean, hard, tough) |
| unfeeling(adjective, person, mean, bad, hard) |
| heartless(adjective, person, mean, feeling, hard) |
| unsympathetic(adjective, person, mean, bad, hard) |
| pitiless(adjective, mean, hard, tough, severe) |
| insensitive(adjective, person, mean, bad, hard) |
| ruthless(adjective, mean, hard, tough, severe) |
| merciless(adjective, mean, hard, tough, severe) |
| unkind(adjective, person, mean, bad, hard) |
| cold(adjective, calm, person, mean, hard) |
| inhuman(adjective, mean, bad, hard, tough) |
| obdurate(adjective, mean, hard, tough, severe) |
| unmerciful(adjective, mean, hard, tough, harsh) |
| cold-blooded(adjective, mean, bad, hard, tough) |
| harsh(adjective, mean, hard, tough, evil) |
| stony-hearted(adjective, hard, cold, cruel, unfeeling) |
| indifferent(adjective, calm, person, hard, feelings) |
| hard(adjective, person, mean, tough, severe) |
| savage(adjective, mean, hard, tough, harsh) |