Where does “odrzwia” come from?

odrzwia (Polish) comes from Polish drzwi, from Proto-Slavic dvь̃rь, from Proto-Balto-Slavic dwírs, from Proto-Indo-European dʰwer- — door.

Ancestry of “odrzwia”, step by step

StepLanguageWordMeaning
1Polishdrzwidoor
2Proto-Slavicdvь̃rьdoor
3Proto-Balto-Slavicdwírsdoor
4Proto-Indo-Europeandʰwer-door
Every word from Proto-Indo-European dʰwer- →Every word from Proto-Balto-Slavic dwírs →Every word from Proto-Slavic dvь̃rь →