triplicate (adj.)youdaoicibaDictYouDict[triplicate 词源字典]
early 15c., "triple, threefold," from Latin triplicatus, past participle of triplicare "to triple," from tri- "three" (see tri-) + plicare "to fold" see ply (v.1)).[triplicate etymology, triplicate origin, 英语词源]
triplicate (v.)youdaoicibaDictYouDict
"to multiply by three," 1620s, from Latin triplicatus (see triplicate (adj.)). Related: Triplicated; triplicating; triplication.