Where does “wyjaić” come from?

wyjaić (Polish) comes from Polish jajo, from Serbo-Croatian jáje, from Proto-Slavic ȃje, from Proto-Balto-Slavic *ṓjan, from Proto-Indo-European h₂ōwyóm, from Proto-Indo-European h₂éwis — bird.

Ancestry of “wyjaić”, step by step

StepLanguageWordMeaning
1Polishjajoegg; ovum; ball, nut
2Serbo-Croatianjájeegg
3Proto-Slavicȃjeegg amniote embryo with protective shell
4Proto-Balto-Slavic*ṓjanegg
5Proto-Indo-Europeanh₂ōwyómegg
6Proto-Indo-Europeanh₂éwisbird
Every word from Proto-Indo-European h₂éwis →Every word from Proto-Indo-European h₂ōwyóm →Every word from Proto-Balto-Slavic *ṓjan →