Reunite

wiktionary

ref

re- +‎  unite

etymonline

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reunite (v.)

c. 1500, reuniten, "join after separation, unite or bring together again" (transitive), from Medieval Latin reunitus, past participle of reunire "unite again," from re- "again" (here perhaps "repetition of an action;" see re-) + Late Latin unire "join together, make into one" (see unite). Intransitive sense of "come together again" is by 1650s. Related: Reunited; reuniting.