| hardhearted(adjective, hard, careless, indifferent, cruel) |
| impassible(adjective, quiet, bad, hard, cold) |
| inhibited(adjective, calm, close, quiet, cool) |
| lethargic(adjective, calm, dull, flat, slow) |
| lifeless(adjective, calm, dull, quiet, flat) |
| neutral(adjective, cold, indifferent, detached, dead) |
| nonchalant(adjective, cold, indifferent, detached, dead) |
| obtuse(adjective, dull, hard, simple, indifferent) |
| sluggish(adjective, calm, dull, quiet, flat) |
| soulless(adjective, hard, careless, indifferent, cruel) |
| spiritless(adjective, dull, quiet, hard, cool) |
| stony-hearted |
| torpid(adjective, dull, quiet, hard, flat) |
| unapproachable(adjective, cold, indifferent, restrained, short) |
| uncongenial(adjective, mean, hard, cool, unpleasant) |
| unreactive |
| unstirred(adjective, calm, mean, hard, cool) |
| untouched(adjective, calm, mean, hard, cool) |
| unkind(adjective, mean, bad, hard, cool) |
| answerless(adjective, calm, quiet, humble, shy) |