Where does “křěn” come from?

křěn (Old Czech) comes from Proto-Slavic xrěnъ — horseradish.

Ancestry of “křěn”, step by step

StepLanguageWordMeaning
1Proto-Slavicxrěnъhorseradish
Every word from Proto-Slavic xrěnъ
křěn — Etymology, Origin & Word History | Etymology Explorer