Failing in duty is a term used to describe an individual who has not fulfilled their obligations or responsibilities. NEGLIGENT, DELINQUENT, REMISS, NEGLECTFUL, and UNTIDY are all words that can be used to describe someone who is failing in their duties. NEGLIGENT refers to someone who is careless or irresponsible in their actions. DELINQUENT implies that someone has failed to fulfill their obligations or duties. REMISS means that someone has been NEGLIGENT or careless in their duties. NEGLECTFUL implies that someone has been careless or irresponsible in their duties. Lastly, UNTIDY implies that someone has been careless or disorganized in their duties.