Where does “běžaś” come from?
běžaś (Lower Sorbian) comes from Proto-Slavic běžati, from Proto-Balto-Slavic bēˀgjā́ˀtei, from Proto-Indo-European bʰégʷ-y-eh₂-ti, from Proto-Indo-European bʰegʷ- — to flee; to run.
běžaś (Lower Sorbian): to flow; to run
Ancestry of “běžaś”, step by step