unify (v.)youdaoicibaDictYouDict[unify 词源字典]
c. 1500, "to make into one," from Middle French unifier (14c.) or directly from Late Latin unificare "make one," from Latin uni- "one" (see uni-) + root of facere "to make" (see factitious). Related: Unified; unifying. Unified (field) theory in physics is recorded from 1935.[unify etymology, unify origin, 英语词源]