Where does “ojansyrjä” come from?

ojansyrjä (Finnish) comes from Finnish oja, from Proto-Slavic oje, from Proto-Indo-European h₂oyHsos.

Ancestry of “ojansyrjä”, step by step

ojansyrjä traces back through two separate lines of ancestry.

via Finnish oja

StepLanguageWordMeaning
1Finnishojaditch, trench; small natural brook
2Proto-Slavicojethill, shaft
3Proto-Indo-Europeanh₂oyHsos—

via Finnish syrjä

StepLanguageWordMeaning
1Finnishsyrjäedge; border; side
2Proto-Finnicsürjäedge, side
3Proto-Finno-Permicśürjä—
Every word from Proto-Indo-European h₂oyHsos →Every word from Proto-Slavic oje →Every word from Finnish oja →