| inadequate(limited, feeble, useless, impractical, hopeless) |
| inane(adjective, value, insignificant, unimportant, empty) |
| inapt |
| inattentive(adjective, careless, indifferent, wild, careful) |
| indifferent(adjective, feature, state, trait, unsympathetic) |
| inoperative(weak, stupid, inferior, idle, inadequate) |
| lackadaisical(adjective, indifferent, cheerful, unsympathetic, easygoing) |
| madcap(adjective, unaccountable, irresponsive) |
| mild(adjective, feature, state, trait) |
| no go(expression, inadequate, limited, feeble, useless) |
| nugatory(adjective, value, inferior, insignificant, inadequate) |
| of no use(expression, idiom, weak, stupid, idle) |
| pointless(adjective, value, stupid, insignificant, idle) |
| relaxed(adjective, feature, state, indifferent, trait) |
| serene(adjective, feature, state, indifferent, trait) |
| tactless(adjective, rude, careless, thoughtless, unwise) |
| uncareful(adjective, careless, wild, immoral, thoughtless) |
| undisturbed(adjective, feature, state, indifferent, trait) |
| unheeding(adjective, careless, thoughtless, unwise, reckless) |
| unmindful(adjective, careless, careful, thoughtless, rash) |