Words that come from Proto-Slavic bьlkъ!

28 words across 5 languages descend from Proto-Slavic bьlkъ! — including -кать, аукать, акать, świerszcz, świerszczyk, сверчок, ыкать, выкать.

See the etymology of bьlkъ! itself →

Russian (8)

Serbo-Croatian (8)

Proto-Slavic (6)

Polish (5)

Old East Slavic (1)