Where does “běžec” come from?
běžec (Czech) comes from Czech běžet, from Old Czech běžěti, 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.
běžec (Czech): runner
Ancestry of “běžec”, step by step