Wiktionary
duty-bound
a. (alternative spelling of dutybound English)
WordNet
duty-bound
adj. under a moral obligation to do something [syn: duty-bound(p), obliged(p)]
Usage examples of "duty-bound".
The archons will be duty-bound to investigate, and while they carry out their ponderous workings, we shall be reasonably safe.
This left Civil duty-bound to escort his slighted mother as they followed their esteemed guest and his prey into the dining hall.