| carefree |
| careless(calm, cool, relaxed, detached, casual) |
| cosmopolitan(sophisticated, cunning, refined, practical, experienced) |
| cynical(refined, practical, mature, cultured, classy) |
| detached(calm, cool, relaxed, indifferent, casual) |
| disabused(disappointed, disheartened, embittered, disenchanted) |
| disillusioned(cool, refined, practical, mature, cultured) |
| dispassionate(calm, cool, relaxed, indifferent, detached) |
| easy(calm, cool, relaxed, detached, casual) |
| easy-going |
| easygoing(calm, cool, relaxed, detached, casual) |
| emotionless(indifferent, apathetic) |
| enlightened(disappointed, disheartened, embittered, disenchanted) |
| free and easy(expression, idiom) |
| half-hearted(adjective, cold, indifferent, dead, apathetic) |
| heartless(indifferent, detached, distant, apathetic, unfeeling) |
| inattentive(indifferent, detached, distant, apathetic, tired) |
| insensible(adjective, cold, dead, unfeeling, apathy) |
| knowing(sophisticated, refined, practical, experienced, mature) |
| lackadaisical(calm, cool, informal, relaxed, indifferent) |