Synonyms:
derelict, delinquent, neglectful, remiss
Meaning: failing in what duty requires; "derelict (or delinquent) in his duty"; "neglectful of his duties"; "remiss of you not to pay your bills"
Synonyms:
inattentive, neglectful
Meaning: not showing due care or attention; "inattentive students"; "an inattentive babysitter"; "neglectful parents"
Usage examples
And it seemed very neglectful not to come to see after you, poor dear child! but really I couldn't raise my head."