Where does “baják” come from?

baják (Polish) comes from Polish bajać, from Proto-Slavic bàjati, from Proto-Balto-Slavic bā́ˀtei, from Proto-Indo-European bʰéh₂ti — to speak, to be talking.

Ancestry of “baják”, step by step

StepLanguageWordMeaning
1Polishbajaćto tell fables or legends
2Proto-Slavicbàjatito tell
3Proto-Balto-Slavicbā́ˀteito speak, tell
4Proto-Indo-Europeanbʰéh₂tito speak, to be talking
Every word from Proto-Indo-European bʰéh₂ti →Every word from Proto-Balto-Slavic bā́ˀtei →Every word from Proto-Slavic bàjati →