neglectful
     adj 1: leaving vulnerable; "neglectful of her own financial
            security" [syn: {neglectful of(p)}]
     2: not showing due care or attention; "inattentive students";
        "an inattentive babysitter"; "neglectful parents" [syn: {inattentive}]
     3: failing in what duty requires; "derelict (or delinquent) in
        his duty"; "neglectful of his duties"; "remiss of you not
        to pay your bills" [syn: {derelict}, {delinquent}, {remiss}]
Source: WordNet® 2.0