Delinquent
(n.) Failing in duty; offending by neglect of duty.
(n.) One who fails or neglects to perform his duty; an offender or transgressor; one who commits a fault or a crime; a culprit.
Similar Words:
Adeling Cordeling Deline Delineable Delineament Delineate Delineated Delineating Delineation Delineator