| unconsidered(adjective, foolish, rash, irresponsible) |
| undiscriminating |
| unenlightened(adjective, unconcerned, ignorant, unconscious, negligent) |
| uninvolved(adjective, indifferent, detached, distant, apathetic) |
| unreasoning(adjective, dull, careless, indifferent, thoughtless) |
| unsuspecting(adjective, thoughtless, unconcerned, ignorant, unconscious) |
| untroubled(adjective, feature, state, indifferent, trait) |
| automatic(adjective, unthinking, superficial, dutiful, sketchy) |
| befuddled(adjective, inattentive) |
| cool(adjective, feature, state, indifferent, trait) |
| day-dreaming(noun, adjective) |
| daydreaming(adjective, careless, silly, foolish, remote) |
| derelict(adjective, careless, indifferent, coarse, unconcerned) |
| desperate(wild, thoughtless, deed, negligent, irresponsible) |
| easy(adjective, feature, state, indifferent, trait) |
| easy-going(adjective, feature, state, trait) |
| frantic(adjective, violent, fast, quick, reckless) |
| giddy(adjective, careless, wild, silly, stupid) |
| go for broke |
| hare-brained(adjective, inattention) |