Where does “rozdziawigęba” come from?

rozdziawigęba (Polish) comes from Polish Gęba, from Proto-Slavic gǫba — mushroom; lip, mouth.

Ancestry of “rozdziawigęba”, step by step

rozdziawigęba traces back through two separate lines of ancestry.

via Polish Gęba

StepLanguageWordMeaning
1PolishGębaface, gob
2Proto-Slavicgǫbamushroom; lip, mouth

via Polish rozdziawić

StepLanguageWordMeaning
1Polishrozdziawićto gape, to open wide
2Proto-Slavic*orz(ъ)zěvitito open one's mouth wide
Every word from Proto-Slavic gǫbaEvery word from Polish Gęba