1. (

• inattentive ,
• neglectful ,

) not showing due care or attention; "inattentive students"; "an inattentive babysitter"; "neglectful parents" ;

2. (

• derelict ,
• delinquent ,
• neglectful ,
• remiss

) failing in what duty requires; "derelict (or delinquent) in his duty"; "neglectful of his duties"; "remiss of you not to pay your bills" ;