replyyoudaoicibaDictYouDict[reply 词源字典]
reply: [14] Etymologically, reply means ‘fold back’. It comes ultimately from Latin replicāre ‘fold back, unfold’, a compound verb formed from the prefix re- ‘back’ and plicāre ‘fold’ (source of English ply and related to English fold). This came to be used metaphorically for ‘go over again, repeat’ (whence English replicate [16]), and also as a legal term for ‘respond’. In this latter sense it passed into English via Old French replier.
=> fold, ply, replicate[reply etymology, reply origin, 英语词源]
reply (v.)youdaoicibaDictYouDict
late 14c., "to make an answer," from Old French replier "to reply, turn back," from Late Latin replicare "to reply, repeat," in classical Latin "fold back, fold over, bend back," from re- "back, again" (see re-) + plicare "to fold" (see ply (v.1)). Latin literal sense of "to fold back" is attested from mid-15c. in English but is not now used. Modern French répliquer (Middle French replier) is directly from Late Latin. Related: Replied; replying.
reply (n.)youdaoicibaDictYouDict
1550s, from reply (v.).