Where does “grubaska” come from?

grubaska (Polish) comes from Polish grubas, from Polish Gruby, from Proto-Slavic grǫbъ, from Proto-Slavic grěti, from Proto-Indo-European gʷʰer-, from Proto-Indo-European gʷʰe-gʷʰór-e ~ gʷʰe-gʷʰr-ḗr.

Ancestry of “grubaska”, step by step

StepLanguageWordMeaning
1Polishgrubasfatso
2PolishGrubythick
3Proto-Slavicgrǫbъcoarse, rude
4Proto-Slavicgrětito warm, to heat; to shine
5Proto-Indo-Europeangʷʰer-warm, hot
6Proto-Indo-Europeangʷʰe-gʷʰór-e ~ gʷʰe-gʷʰr-ḗr—
Every word from Proto-Indo-European gʷʰe-gʷʰór-e ~ gʷʰe-gʷʰr-ḗr →Every word from Proto-Indo-European gʷʰer- →Every word from Proto-Slavic grěti →