- negligent - characterized by neglect and undue lack of concern; "negligent parents"; "negligent of detail"; "negligent in his correspondence"
Antonyms: diligent, assiduous, sedulous, hardworking, industrious, tireless, untiring
- negligent - marked by insufficient care or attention; "a negligent housekeeper"; "negligent about personal cleanliness"
Antonym: careful (indirect, via careless)