| half-hearted(adjective, cold, dead, apathy, passive) |
| halfhearted(adjective, cold, dead, apathy, passive) |
| hard-boiled(adjective, hard, indifferent, detached, distant) |
| hard-hearted(adjective, indifferent, detached, weary, distant) |
| hard as nails(expression, adjective, idiom, hard, indifferent) |
| hardened(adjective, hard, indifferent, unsympathetic, unkind) |
| haughty(adjective, indifferent, detached, distant, remote) |
| imperceptive(adjective, hard, indifferent, unkind, unresponsive) |
| impertinent(adjective, cool, indifferent, restrained, unfriendly) |
| impudent(adjective, cool, indifferent, restrained, unfriendly) |
| inert(adjective, cold, dead, apathy, passive) |
| inexcitable |
| insolent(adjective, cool, indifferent, restrained, unfriendly) |
| insusceptible(adjective, hard, insensitive, unsusceptible) |
| jejune |
| laid back(expression, adjective, calm, cool, relaxed) |
| laodicean(adjective, cold, dead, apathy, passive) |
| lax(adjective, careless, relaxed, indifferent, apathetic) |
| lone wolf(expression, adjective, indifferent, detached, distant) |
| loner(adjective, indifferent, detached, distant, remote) |