| unmerciful(adjective, mean, hard, severe, harsh) |
| unsympathetic(adjective, mean, hard, severe, harsh) |
| affectless |
| barbarous(adjective, mean, hard, severe, harsh) |
| brutal(adjective, hard, cruel, unfeeling, unsympathetic) |
| cold(adjective, unfeeling, unsympathetic, pitiless, hardhearted) |
| cutthroat(adjective, mean, severe, harsh, cruel) |
| dog-eat-dog(adjective, mean, severe, harsh, cruel) |
| fierce(adjective, mean, hard, severe, harsh) |
| gratuitous(adjective, mean, severe, harsh, cruel) |
| grim(adjective, mean, hard, severe, harsh) |
| hard-hearted(adjective, hard, cruel, unfeeling, unsympathetic) |
| harsh(adjective, mean, hard, severe, cruel) |
| hatchet job(expression, adjective, mean, severe, harsh) |
| having a killer instinct(expression, adjective, idiom, mean, severe) |
| implacable(adjective, mean, hard, severe, harsh) |
| inexorable(adjective, mean, hard, severe, harsh) |
| inhumane(adjective, mean, hard, severe, harsh) |
| insensate |
| iron-fisted(adjective, mean, severe, harsh, cruel) |