| objective(adjective, tough, indifferent, rational, straightforward) |
| pitiless(adjective, hard, tough, severe, cold) |
| quiet(adjective, easy, flat, slow, heavy) |
| relaxed(adjective, calm, cool, slow, careless) |
| remiss(noun, adjective, dull, quiet, easy) |
| removed(adjective, careless, indifferent, casual, aloof) |
| self-controlled(adjective, calm, cool, indifferent, tolerant) |
| shiftless(adjective, dull, idle, sluggish, dubious) |
| slow-moving(adjective, dull, quiet, easy, slow) |
| somnolent(adjective, dull, careless, relaxed, indifferent) |
| soporific(adjective, dull) |
| staid(adjective, indifferent, casual, aloof, unemotional) |
| standoffish(adjective, cool, indifferent, restrained, unfriendly) |
| stony-hearted |
| stupid(adjective, dull, sluggish, impassive, lazy) |
| tranquil(adjective, unexcitable) |
| uncurious(adjective, indifferent, casual, aloof, unfeeling) |
| unfriendly(adjective, cool, indifferent, restrained, aloof) |
| unperturbed(adjective, calm, cool, relaxed, indifferent) |
| unstirred(adjective, mean, hard, unsympathetic) |