Where does “berž-” come from?

berž- (Proto-Balto-Slavic) comes from Proto-Balto-Slavic berźas, from Proto-Indo-European bʰerHǵos — birch.

Ancestry of “berž-”, step by step

berž- traces back through two separate lines of ancestry.

via Proto-Balto-Slavic berźas

StepLanguageWordMeaning
1Proto-Balto-Slavicberźas—
2Proto-Indo-EuropeanbʰerHǵosbirch

via Proto-Balto-Slavic berźā

StepLanguageWordMeaning
1Proto-Balto-Slavicberźā—
2Proto-Indo-EuropeanbʰerHǵs—
Every word from Proto-Indo-European bʰerHǵos →Every word from Proto-Balto-Slavic berźas →