| unconcerned(adjective, calm, cool, mild, careless) |
| ad-lib(adjective, adverb, free, simple, fake) |
| ad lib(expression, adjective, idiom, adverb, free) |
| indifferent(adjective, calm, cool, careless, relaxed) |
| off-the-cuff(adjective, adverb, simple, informal, natural) |
| informal(adjective, cool, free, careless, casual) |
| brusque(adjective, rough, rude, careless, indifferent) |
| cool(adjective, calm, informal, careless, relaxed) |
| inconsiderate(adjective, person, neglect, careless, indifferent) |
| nonchalant(adjective, calm, cool, mild, careless) |
| uninterested(adjective, cool, careless, indifferent, restrained) |
| unplanned(noun, adjective, free, simple, fake) |
| easygoing(adjective, calm, cool, careless, relaxed) |
| impulsive(noun, adjective, adverb, simple, careless) |
| offhandedly |
| short(adjective, rough, rude, casual, angry) |
| unthinking(adjective, careless, indifferent, casual, thoughtless) |
| aloof(adjective, calm, cool, careless, relaxed) |
| flippant(adjective, casual, frivolous, glib, irreverent) |
| glib(adjective, careless, indifferent, casual, nonchalant) |