Proto-Slavic *běgъ

→ Bulgarian бяг (inherited)

→ Czech běh (inherited)

→ Macedonian бег (inherited)

→ Polish bieg (inherited)

→ Romanian pribeag (mention)

→ Russian бег (inherited)

→ Serbo-Croatian bijeg (inherited)

→ Slovak beg (inherited(sk/sl))

→ Slovak beh (inherited)

→ Ukrainian біг (inherited)