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
