remainder (n.)youdaoicibaDictYouDict[remainder 词源字典]
late 14c., from Anglo-French remainder, Old French remaindre, noun use of infinitive, a variant of Old French remanoir (see remain (v.)). The verb meaning "dispose of (books) at a reduced price" is from 1904. Related: Remaindered.[remainder etymology, remainder origin, 英语词源]