Where does “Bilas” come from?

Bilas (Polish) comes from Proto-Slavic bělъ, from Proto-Indo-European bʰēlHs — white surface or stain.

Ancestry of “Bilas”, step by step

StepLanguageWordMeaning
1Proto-Slavicbělъwhite
2Proto-Indo-EuropeanbʰēlHswhite surface or stain
Every word from Proto-Indo-European bʰēlHs →Every word from Proto-Slavic bělъ →