Where does “izbiany” come from?

izbiany (Polish) comes from Polish izba, from Old Polish izba, from Proto-Slavic jьstъba, from Proto-Germanic *stubu.

Ancestry of “izbiany”, step by step

StepLanguageWordMeaning
1Polishizbachamber, room; chamber, house, office
2Old Polishizbaroom, hut
3Proto-Slavicjьstъbaroom
4Proto-Germanic*stubu—
Every word from Proto-Germanic *stubu →Every word from Proto-Slavic jьstъba →Every word from Old Polish izba →