Where does “[[čiest]], [[čěst]]” come from?

[[čiest]], [[čěst]] (Old Czech) comes from Proto-Slavic čęstь — part.

Ancestry of “[[čiest]], [[čěst]]”, step by step

StepLanguageWordMeaning
1Proto-Slavicčęstьpart

Words derived from “[[čiest]], [[čěst]]

Every word from Proto-Slavic čęstь