Where does “więckaj” come from?

więckaj (Polish) comes from Polish wiec, from Old Polish wiece, from Proto-Slavic *vě̑ťe — council, veche.

Ancestry of “więckaj”, step by step

więckaj traces back through two separate lines of ancestry.

via Polish wiec

StepLanguageWordMeaning
1Polishwiecgathering, rally
2Old Polishwieceassembly, council
3Proto-Slavic*vě̑ťecouncil, veche

via Polish kaj

StepLanguageWordMeaning
1Polishkaj
Every word from Proto-Slavic *vě̑ťeEvery word from Old Polish wieceEvery word from Polish wiec