Where does “boiarin” come from?

boiarin (English) comes from Russian боя́рин, from Old East Slavic боꙗринъ, from Old Church Slavonic болꙗринъ, from Proto-Slavic bojь, from Proto-Indo-European bʰoyh₂ós, from Proto-Indo-European bʰeyh₂- — to fear, be afraid; to strike, hit; to hew, cut.

Ancestry of “boiarin”, step by step

StepLanguageWordMeaning
1Russianбоя́ринfeudal lord
2Old East Slavicбоꙗринъ—
3Old Church Slavonicболꙗринъaristocrat, nobleman, boyar
4Proto-Slavicbojьbattle, fight
5Proto-Indo-Europeanbʰoyh₂ós—
6Proto-Indo-Europeanbʰeyh₂-to fear, be afraid; to strike, hit; to hew, cut
Every word from Proto-Indo-European bʰeyh₂- →Every word from Proto-Indo-European bʰoyh₂ós →Every word from Proto-Slavic bojь →