defeasance (n.)youdaoicibaDictYouDict[defeasance 词源字典]
early 15c., from Anglo-French defesaunce, Old French desfaisance "undoing, destruction," from desfaire (Modern French défaire) "to undo, destroy" (see defeat (v.)). Related: Defease; defeasible.[defeasance etymology, defeasance origin, 英语词源]