undutiful

from WordNet (r) 3.0 (2006)

undutiful
    adj 1: lacking due respect or dutifulness; "impious toward one's
           parents"; "an undutiful son" [syn: {impious},
           {undutiful}]

from The Collaborative International Dictionary of English v.0.48

Undutiful \Undutiful\
   See {dutiful}.

from Moby Thesaurus II by Grady Ward, 1.0

43 Moby Thesaurus words for "undutiful":
      Laodicean, apostate, atheistic, backsliding, blasphemous,
      disobedient, fallen, fallen from grace, froward, impious,
      indevotional, indevout, indifferent, indifferentist, indisciplined,
      irreligious, irreverent, lapsed, lawless, lukewarm, naughty,
      nonconforming, nonobservant, nonreligious, obstinate, profanatory,
      profane, recidivist, recidivistic, recreant, recusant, renegade,
      sacrilegious, self-willed, transgressive, uncomplying, undevout,
      undisciplined, unduteous, unreligious, violative, wayward,
      willful