| obtuse(noun, adjective, hard, indifferent, unsympathetic) |
| sadistic(adjective, person, mean, evil, nasty) |
| surly(adjective, mean, harsh, cruel, vicious) |
| thoughtless(adjective, mean, sharp, rough, harsh) |
| tyrannical(adjective, evil, nasty, harsh, cruel) |
| unbending(adjective, hard, tough, severe, harsh) |
| uncharitable(adjective, person, mean, hard, cool) |
| unimpressionable(adjective, hard, careless, indifferent, cruel) |
| unloving(adjective, person, hard, cool, cold) |
| unperceptive(adjective, sharp, rough, careless, thoughtless) |
| unsparing(adjective, person, mean, tough, severe) |
| vicious(adjective, mean, evil, nasty, harsh) |
| adamant(adjective, mean, hard, tough, harsh) |
| asleep(adjective, cruel, dead, unsympathetic, numb) |
| austere(adjective, hard, cool, tough, severe) |
| bloodthirsty(adjective, severe, evil, nasty, harsh) |
| blunt(adjective, hard, tough, harsh, rude) |
| cantankerous(adjective, cruel, unsympathetic, numb, pitiless) |
| chill(adjective, bad, cool, cold, detached) |
| coldhearted(adjective, mean, hard, severe, harsh) |