| demanding(adjective, severe, violent, hostile, exacting) |
| hardened(adjective, person, hard, tough, harsh) |
| inhuman(adjective, person, mean, hard, tough) |
| revengeful(adjective, mean, harsh, cruel, vicious) |
| rigid(adjective, harsh, cruel, determined, fierce) |
| rough(adjective, person, hard, severe, harsh) |
| savage(adjective, mean, hard, tough, severe) |
| spiteful(adjective, mean, hateful, unkind, malicious) |
| unbending(adjective, hard, rough, harsh, cruel) |
| vengeful(adjective, mean, severe, harsh, cruel) |
| awful |
| barbarous(adjective, mean, hard, tough, severe) |
| cold-blooded(adjective, person, mean, hard, harsh) |
| dogged(adjective, harsh, cruel, determined, fierce) |
| exacting(adjective, hard, severe, rough, harsh) |
| flinty(adjective, rocky, pebbly) |
| forbidding(adjective, person, hard, tough, harsh) |
| hard-hearted(adjective, mean, hard, tough, harsh) |
| hardhearted(adjective, mean, hard, severe, harsh) |
| sadistic(adjective, person, mean, harsh, cruel) |