| compassionless(adjective, mean, hard, severe, attitude) |
| impassible(hard, insensitive, insensibility, unsusceptible) |
| implacable(adjective, mean, hard, severe, evil) |
| inexorable(adjective, mean, hard, tough, severe) |
| malicious(adjective, mean, nasty, harsh, violent) |
| rough(adjective, rude, violent, cruel, vicious) |
| rude(adjective, violent, cruel, vicious, fierce) |
| steely(adjective, cold, cruel, unfeeling, unsympathetic) |
| stern(adjective, mean, harsh, cruel, vicious) |
| tyrannical(adjective, evil, nasty, harsh, vicious) |
| unbending(adjective, mean, hard, careless, indifferent) |
| unimpassioned(adjective, cool, detached, blank, sober) |
| unimpressionable(adjective, hard, careless, indifferent, cruel) |
| unkindly(adjective, adverb) |
| unsusceptible(adjective, hard, careless, indifferent, cruel) |
| wicked(adjective, bad, wrong, evil, nasty) |
| benumbed(adjective, hard, tough, severe, cruel) |
| blah(adjective, detached, impassive, unresponsive, laid-back) |
| blase(indifferent, detached, distant, apathetic, unfeeling) |
| chill(adjective, cool, detached, blank, sober) |