negligent

Từ điển WordNet v3.1 - WordNet Dictionary

adjective

characterized by neglect and undue lack of concern (Freq. 1)
- negligent parents
- negligent of detail
- negligent in his correspondence
• Ant:
diligent
• Similar to:
derelict, delinquent, neglectful, remiss, lax,
slack, hit-and-run, inattentive
• See Also:
careless, inattentive
• Derivationally related forms:
negligence, neglect