| hardened(adjective, hard, tough, harsh, cruel) |
| remorseless(adjective, impenitent) |
| callous(adjective, impenitent) |
| unrepentant(adjective, impenitent) |
| hard(adjective, tough, harsh, cruel, grim) |
| impenitent(adjective, hard, tough, harsh, cruel) |
| unremorseful(adjective, impenitent) |
| unapologetic |
| avaricious(adjective, hard, tough, harsh, cruel) |
| barbarous(adjective, hard, tough, harsh, cruel) |
| bloody(adjective, hard, tough, harsh, cruel) |
| fierce(adjective, hard, tough, harsh, cruel) |
| forbidding(adjective, hard, tough, harsh, cruel) |
| grim(adjective, hard, tough, harsh, cruel) |
| hard-bitten(adjective, hard, tough, harsh, cruel) |
| hard-hearted(adjective, hard, tough, harsh, cruel) |
| harsh(adjective, hard, tough, cruel, grim) |
| implacable(adjective, hard, tough, harsh, cruel) |
| inexorable(adjective, hard, tough, harsh, cruel) |
| inhuman(adjective, hard, tough, harsh, cruel) |