Where does “-о́й” come from?

-о́й (Russian) comes from Proto-Slavic jь, from Proto-Balto-Slavic iś, from Old Polish ić, from Proto-Slavic jьti, from Proto-Balto-Slavic eitei, from Proto-Indo-European h₁éyti, from Proto-Indo-European h₁ey- — to go.

Ancestry of “-о́й”, step by step

StepLanguageWordMeaning
1Proto-Slavicjьthis; he
2Proto-Balto-Slaviciśthis
3Old Polishićto go
4Proto-Slavicjьtito go
5Proto-Balto-Slaviceiteito go
6Proto-Indo-Europeanh₁éytito go, to be going
7Proto-Indo-Europeanh₁ey-to go

Words derived from “-о́й”

Every word from Proto-Indo-European h₁ey- →Every word from Proto-Indo-European h₁éyti →Every word from Proto-Balto-Slavic eitei →
-о́й — Etymology, Origin & Word History | Etymology Explorer