| stonyhearted(adjective, coldhearted) |
| unappeasable(adjective, mean, harsh, cruel, determined) |
| uncalled-for(adjective, mean, cruel, senseless, pitiless) |
| unkindly(adjective, evil, negative, coldhearted) |
| unmoved(adjective, cold, cruel, unfeeling, unsympathetic) |
| unsympathizing(adjective, mean, unkind, coldhearted) |
| wild(adjective, rough, violent, cruel, vicious) |
| apathetic(adjective, person, hard, tough, severe) |
| crude(adjective, rough, violent, cruel, vicious) |
| evil(adjective, nasty, harsh, corrupt, vicious) |
| exacting(adjective, hard, tough, severe, rough) |
| frigid(adjective, hard, heartless, rocky, pebbly) |
| ghoulish |
| gratuitous(adjective, mean, cruel, senseless, pitiless) |
| hardened(adjective, person, hard, tough, severe) |
| incompatible(adjective, coldhearted) |
| menacing(adjective, behavior, aroused negative, aroused awful feeling) |
| punitive(adjective, severe, harsh, cruel, reactive) |
| sadistic(adjective, mean, evil, nasty, harsh) |
| thick-skinned(adjective, hard, tough, severe, cruel) |