Where does “чьрствъ” come from?

чьрствъ (Old East Slavic) comes from Proto-Slavic čьrstvъ, from Proto-Balto-Slavic kirst(w)os, from Proto-Indo-European krt-two-.

Ancestry of “чьрствъ”, step by step

StepLanguageWordMeaning
1Proto-Slavicčьrstvъfirm
2Proto-Balto-Slavickirst(w)os—
3Proto-Indo-Europeankrt-two-—

Words derived from “чьрствъ”

Every word from Proto-Indo-European krt-two- →Every word from Proto-Balto-Slavic kirst(w)os →Every word from Proto-Slavic čьrstvъ →