| hard(adjective, mean, cool, unpleasant, careless) |
| humble(adjective, calm, quiet, shy, silent) |
| incurious(adjective, hard, cold, indifferent, feelings) |
| inflexible(adjective, person, hard, careless, indifferent) |
| insusceptible(adjective, hard, insensitive, unsusceptible) |
| irresponsive(adjective, bad, cold, humble, shy) |
| meek(adjective, calm, quiet, humble, shy) |
| merciless(adjective, person, feelings, emotions, rocky) |
| numb(adjective, dull, quiet, flat, heavy) |
| obdurate(adjective, person, mean, hard, cool) |
| objective(adjective, indifferent, detached, distant, apathetic) |
| silent(adjective, calm, quiet, indifferent, humble) |
| standoffish(adjective, cool, cold, indifferent, restrained) |
| stoic(adjective, calm, dull, cold, indifferent) |
| uncommunicative(adjective, indifferent, restrained, shy, detached) |
| unreceptive(adjective, inactive, inert, coldhearted) |
| acquiescent(adjective, calm, quiet, humble, shy) |
| cold-hearted(adjective, cool, cold, detached, unfriendly) |
| frosty(adjective, cool, cold, detached, unfriendly) |
| halfhearted(adjective, mean, hard, cool, unpleasant) |