negligent

negligent adj., adv. careless in not fulfilling responsibility. (See: negligence)

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negligent adjective bungling, careless, delinquent, derelict, disregardful, heedless, ill-considered, improvident, imprudent, inadvertent, inattentive, indifferent, injudicious, inobservant, lax, mindless, neglectful, neglegens, oblivious, off guard, rash, reckless, regardless, remiss, remissus, slack, slipshod, slothful, slovenly, temerarious, temerous, thoughtless, unalert, uncalculating, uncircumspect, undiligent, unheedful, unheeding, unmindful, unthinking, unthorough, unwary, unwatchful
Associated concepts: negligent act, negligent conduct, negligent injury

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See also: blameful, blameworthy, careless, delinquent, disobedient, heedless, improvident, inadvertent, indolent, injudicious, lax, oblivious, perfunctory, reckless, remiss, slipshod, thoughtless