- negligence, carelessness, neglect, nonperformance - failure to act with the prudence that a reasonable person would exercise under the same circumstances
--1 is a kind of nonaccomplishment, nonachievement
--1 has particulars:dereliction; comparative negligence; concurrent negligence; contributory negligence; criminal negligence, culpable negligence; neglect of duty; evasion, escape, dodging - negligence, neglect, neglectfulness - the trait of neglecting responsibilities and lacking concern
--2 is a kind of carelessness
--2 has particulars:delinquency, dereliction, willful neglect; laxness, laxity, remissness