reduplicate
v.
1560s, from Medieval Latin reduplicatus, past participle of reduplicare "to redouble," from re- "back, again" (see re-) + Latin duplicare "to double" (see duplicate, adj.). Related: Reduplicated; reduplicating; reduplicative.
〔李〕[re-;duplicatea.] v.重复； 使加倍 a.重复的； 加倍的 ←du,dupl (L duo,duples)=two, twofold 二，两倍