negligent

failing to give proper care and attention the youngster has been woefully negligent in taking care of the vacationing neighbor's dog, repeatedly forgetting to feed the poor animal Synonyms careless, derelict, disregardful, lax, lazy, neglectful, neglecting, remiss, slack Related Words heedless, incautious, irresponsible, reckless, wild; unguarded, unwary; forgetful; disregardful, disregarding, inattentive, oblivious, thoughtless, unheeding, unmindful, unthinking; apathetic, disinterested, indifferent, unconcerned, uninterested; delinquent; loose Near Antonyms meticulous, painstaking, punctilious; cautious, chary, circumspect, gingerly, guarded; alert, heedful, heeding, mindful, observant, regardful, regarding, vigilant, wary, watchful; foresighted, forethoughtful, provident, responsible; thinking, thoughtful; concerned, interested Antonyms attentive, careful, conscientious, nonnegligent