Where does “Barszczak” come from?

Barszczak (Polish) comes from Polish Barszcz, from Old Polish barszcz, from Proto-Slavic bъrščь, from Proto-Balto-Slavic bursktis.

Ancestry of “Barszczak”, step by step

StepLanguageWordMeaning
1PolishBarszczborscht
2Old Polishbarszczcommon hogweed
3Proto-Slavicbъrščьhogweed; hogweed soup, borscht
4Proto-Balto-Slavicbursktis—
Every word from Proto-Balto-Slavic bursktis →Every word from Proto-Slavic bъrščь →Every word from Old Polish barszcz →