| dispassionate(adjective, calm, cool, cold, indifferent) |
| dull(noun, verb, adjective, quiet, develop) |
| insensate(noun, adjective, bad, hard, tough) |
| aloof(adjective, calm, mean, hard, cool) |
| dead(adjective, dull, quiet, flat, cold) |
| insentient(adjective, bad, hard, cold, cruel) |
| frigid(adjective, mean, hard, cool, harsh) |
| inflexible(adjective, person, hard, tough, rough) |
| senseless(adjective, bad, hard, tough, severe) |
| severe(adjective, calm, mean, hard, tough) |
| barbarous(adjective, mean, hard, severe, evil) |
| pachydermatous(noun, adjective, insensibility, physical insensibility) |
| stiff(adjective, set, strong, hard, severe) |
| stony-hearted(adjective, cold, cruel, unfeeling, unsympathetic) |
| unmerciful(adjective, mean, severe, harsh, cruel) |
| unmoved(adjective, calm, mean, hard, cool) |
| atrocious(adjective, evil, nasty, harsh, cruel) |
| firm(verb, adjective, close, set, fix) |
| impassible(adjective, quiet, bad, cold, indifferent) |
| obtuse(noun, adjective, hard, indifferent, apathetic) |