Where does “zamjenjivati” come from?

zamjenjivati (Serbo-Croatian) comes from Serbo-Croatian zamijéniti, from Serbo-Croatian za, from Proto-Slavic za — behind, after (stationary).

Ancestry of “zamjenjivati”, step by step

StepLanguageWordMeaning
1Serbo-Croatianzamijénitito replace
2Serbo-Croatianzafor; behind, in back of, at; during
3Proto-Slaviczabehind, after (stationary)
Every word from Proto-Slavic za →Every word from Serbo-Croatian za →Every word from Serbo-Croatian zamijéniti →
zamjenjivati — Etymology, Origin & Word History | Etymology Explorer