Middle English dutyfrom Old French fromdevoirto owefrom Latin dēbēreghabh- in Indo-European roots
American Heritage Dictionary of the English Language, 5th Edition
From Old French deveir (French devoir), from Latindebere (“to owe”)
Devoir Sentence Examples
In acting thus they were merely conforming to the duty of counselling (devoir de conseil) which all the superior authorities had towards the king, and the text of the ordinances (ordonnances) had often invited them to do so.
Conti also wrote Lettres sur la grace, and Du devoir des grands et des devoirs des gouverneurs de province.