| impotent(adjective, cool, cold, detached, unfriendly) |
| inanimate(adjective, hard, tough, severe, cold) |
| inaudacious(adjective, bad behavior) |
| inflexible(adjective, unfeeling, unsympathetic, uncaring, pitiless) |
| inhuman(adjective, hard, tough, severe, cold) |
| insensate(adjective, hard, tough, severe, cold) |
| iron-hearted(adjective, hard, tough, severe, cold) |
| jejune |
| lifeless(adjective, cool, cold, detached, unfriendly) |
| numb(adjective, hard, tough, severe, cold) |
| passive(adjective, cool, cold, detached, unfriendly) |
| premeditated(adjective, cold, pitiless, hardhearted) |
| relentless(adjective, hard, cold, cruel, unfeeling) |
| repellent(adjective, cool, cold, detached, unfriendly) |
| reserved |
| rigid(adjective, cool, cold, detached, unfriendly) |
| savage(adjective, hard, cold, cruel, unfeeling) |
| sensationless(adjective, hard, tough, severe, cold) |
| senseless(adjective, hard, tough, severe, cold) |
| severe(adjective, hard, tough, cold, cruel) |