reunite (v.)youdaoicibaDictYouDict[reunite 词源字典]
c. 1500, from Medieval Latin reunitus, past participle of reunire "unite again," from Latin re- "again" (see re-) + Late Latin unire "join together, make into one" (see unite). Related: Reunited; reuniting.[reunite etymology, reunite origin, 英语词源]