Where does “бързъ” come from?

бързъ (Old Church Slavonic) comes from Proto-Slavic bъrzъ — fast, swift.

Ancestry of “бързъ”, step by step

StepLanguageWordMeaning
1Proto-Slavicbъrzъfast, swift

Words derived from “бързъ

Every word from Proto-Slavic bъrzъ