Where does “sztubak” come from?

sztubak (Polish) comes from Polish sztuba, from German stube, from Middle High German stube, from Old High German stuba, from Proto-Germanic *stubu.

Ancestry of “sztubak”, step by step

StepLanguageWordMeaning
1Polishsztubaschool
2Germanstubeliving room
3Middle High Germanstube—
4Old High Germanstubaa heated room; bathroom; step
5Proto-Germanic*stubu—
Every word from Proto-Germanic *stubu →Every word from Old High German stuba →Every word from Middle High German stube →