| ruthless(adjective, hard, tough, severe, cold) |
| soporific(adjective, senseless) |
| stony(adjective, hard, tough, severe, cruel) |
| uncompassionate(adjective, hard, tough, severe, cold) |
| unconscious(adjective, unfeeling, senseless, numb, insensitive) |
| unresponsive(adjective, flat, cold, numb, insensitive) |
| unsusceptible(adjective, dead, impassive, insensitive, insusceptible) |
| anesthetize(verb, quiet, diminish, impair, numb) |
| apathetic(adjective, hard, tough, severe, cold) |
| asleep(adjective, hard, tough, severe, cold) |
| cold(adjective, hard, tough, severe, flat) |
| coldhearted(adjective, severe, unfeeling, numb, hard-hearted) |
| detached(verb, adjective, relaxed, unfeeling, numb) |
| disabled(verb, disabled) |
| faint(adjective, lower, short, senseless, relieved) |
| frosted(numb, allying, whites) |
| hard(adjective, tough, severe, cruel, unfeeling) |
| hard-boiled(adjective, insensitive) |
| hardened(adjective, hard, tough, severe, cruel) |
| icy(adjective, hard, tough, severe, cold) |