資料來源 : Webster's Revised Unabridged Dictionary (1913)

Dutiful \Du"ti*ful\, a.
   1. Performing, or ready to perform, the duties required by
      one who has the right to claim submission, obedience, or
      deference; submissive to natural or legal superiors;
      obedient, as to parents or superiors; as, a dutiful son or
      daughter; a dutiful ward or servant; a dutiful subject.

   2. Controlled by, proceeding from, a sense of duty;
      respectful; deferential; as, dutiful affection.

   Syn: Duteous; obedient; reverent; reverential; submissive;
        docile; respectful; compliant. -- {Du"ti*ful*ly}, adv.
        -- {Du"ti*ful*ness}, n.

資料來源 : WordNet®

dutifulness
     n : piety by virtue of devotion to duty