Where does “běžěti” come from?

běžěti (Old Czech) 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.

Ancestry of “běžěti”, step by step

Step	Language	Word	Meaning
1	Proto-Slavic	běžati	to run, escape
2	Proto-Balto-Slavic	bēˀgjā́ˀtei	to run, flee
3	Proto-Indo-European	bʰégʷ-y-eh₂-ti	—
4	Proto-Indo-European	bʰegʷ-	to flee; to run

Every word from Proto-Indo-European bʰegʷ- →

běžěti — Etymology, Origin & Word History | Etymology Explorer