apartyoudaoicibaDictYouDict[apart 词源字典]
apart: [14] English acquired apart from Old French apart, where it was based on the Latin phrase ā parte ‘at or to the side’ (Latin pars, part- is the source of English part). By the time it came into English it already contained the notion of separation.
=> part[apart etymology, apart origin, 英语词源]
apart (adv.)youdaoicibaDictYouDict
late 14c., from Old French à part "to the side," from Latin ad "to" (see ad-) + partem, accusative of pars "a side" (see part (n.)).