attorn (v.)youdaoicibaDictYouDict[attorn 词源字典]
late 13c., Anglo-French, "to turn over to another," from Old French atorner "to turn, turn to, assign, attribute, dispose," from a- "to" (see ad-) + tourner "to turn" (see turn (v.)). In feudal law, "to transfer homage or allegiance to another lord."[attorn etymology, attorn origin, 英语词源]