| unresponsive(adjective, calm, mean, hard, cool) |
| devil-may-care(adjective, feature, state, careless, trait) |
| easy(adjective, feature, state, calm, dull) |
| inattentive(noun, adjective, dull, sharp, rude) |
| languid(adjective, feature, state, calm, dull) |
| offhand(adjective, calm, cool, mild, careless) |
| unaffected(adjective, hard, temper, careless, cold) |
| untroubled(adjective, feature, state, calm, quiet) |
| carefree(adjective, feature, state, calm, mild) |
| happy-go-lucky(adjective, feature, state, mild, careless) |
| lethargic(adjective, calm, dull, weak, easy) |
| neutral(adjective, calm, quiet, cool, moderate) |
| passive(adjective, calm, dull, careless, indifferent) |
| blithe(adjective, feature, state, indifferent, trait) |
| cold-blooded(adjective, mean, hard, cool, temper) |
| half-hearted(adjective, temper, cold, indifferent, negative) |
| heartless(adjective, mean, hard, cool, unpleasant) |
| inconsiderate(adjective, sharp, rude, careless, indifferent) |
| oblivious(noun, adjective, indifferent, casual, sloppy) |
| regardless(adjective, careless, indifferent, detached, casual) |