What is duty; service owed; hence, due act of civility or respect; -- now usually in the plural; as, they paid their devoirs to the ladies. "Do now your devoid, young knights!" Chaucer called?

devoir — Duty; service owed; hence, due act of civility or respect; -- now usually in the plural; as, they paid their devoirs to the ladies. "Do now your devoid, young knights!" Chaucer. (Webster's 1913.)