| severe(adjective, calm, mean, hard, tough) |
| aloof(adjective, calm, person, indifferent, feelings) |
| brutal(adjective, mean, hard, tough, severe) |
| cold-hearted(adjective, person, hard, tough, severe) |
| hard-boiled(adjective, calm, mean, bad, hard) |
| stony(adjective, mean, hard, tough, severe) |
| tough(adjective, mean, hard, severe, harsh) |
| uncaring(adjective, person, mean, bad, hard) |
| uncharitable(adjective, mean, nasty, ill, hostile) |
| unyielding(adjective, mean, hard, tough, harsh) |
| frigid(adjective, person, feelings, detached, impassive) |
| inflexible(adjective, mean, hard, harsh, stubborn) |
| insensible(adjective, bad, hard, tough, severe) |
| remorseless(adjective, mean, hard, severe, harsh) |
| unresponsive(adjective, calm, bad, cold, indifferent) |
| apathetic(adjective, hard, tough, severe, cold) |
| firm(adjective, mean, hard, tough, stubborn) |
| hardened(adjective, hard, tough, severe, harsh) |
| inhumane(adjective, mean, hard, tough, evil) |
| mean(adjective, hard, tough, nasty, harsh) |