adjective
without sufficient attention
Synonyms: absent-minded, abstracted, casual, cursory, disregardful, forgetful, hasty, heedless, improvident, imprudent, inaccurate, inadvertent, incautious, inconsiderate, indifferent, indiscreet, indolent, injudicious, irresponsible, lackadaisical, lax, loose, mindless, napping, negligent, nonchalant, oblivious, offhand, perfunctory, pococurante, reckless, regardless, remiss, slipshod, sloppy, thoughtless, uncircumspect, unconcerned, unguarded, unheeding, unmindful, unobservant, unreflective, unthinking, wasteful
Antonyms: accurate, attentive, careful, cautious, concerned, mindful, painstaking, prudent, ready, thoughtful
adjective
artless
Synonyms: casual, modest, naive, natural, nonchalant, simple, unstudied
Antonyms: cautious, guarded, kind, mindful, scrupulous