dutiful

• dutifull (archaic)

From duty +‎ -ful.

dutiful (comparative more dutiful, superlative most dutiful)

1. Accepting of one's legal or moral obligations and willing to do them well, and without complaint.

   Ralph was a dutiful child, and took the trash out without being told.

   • 1996, Paul Heaton, Dave Rotheray, “Rotterdam (or Anywhere)”, in Blue Is the Colour, performed by The Beautiful South:

     And when blondes and beautiful are multiple / They become so dull and dutiful

2. Pertaining to one's duty; demonstrative of one's sense of duty.