| dogged(adjective, harsh, cruel, determined, fierce) |
| ferine(adjective, harsh, violent, cruel, vicious) |
| firm(difficult, fixed, rigid, troubled, inflexible) |
| forbidding(adjective, close, hard, tough, severe) |
| ghoulish |
| horrible |
| icy(adjective, hard, tough, severe, cold) |
| killer(adjective, mean, harsh, cruel, vicious) |
| malevolent(adjective, mean, nasty, harsh, violent) |
| malicious(adjective, animal, mean, nasty, harsh) |
| malign(adjective, animal, mean, cruel, vicious) |
| malignant(adjective, animal, mean, cruel, vicious) |
| mortal(adjective, mean, severe, harsh, cruel) |
| niggardly |
| predatory(adjective, violent, cruel, vicious, fierce) |
| punitive(adjective, hard, severe, sharp, nasty) |
| rapacious(adjective, harsh, violent, cruel, vicious) |
| rigorous(adjective, hard, tough, severe, harsh) |
| rocky(adjective, difficult, troubled, inflexible, unyielding) |
| satanic(adjective, care, mercy) |