Where does “klas” come from?

klas (Old Czech) comes from Proto-Slavic kȏlsъ, from Proto-Indo-European kolH-so-.

Ancestry of “klas”, step by step

StepLanguageWordMeaning
1Proto-Slavickȏlsъear (of grain)
2Proto-Indo-EuropeankolH-so-—

Words derived from “klas”

Every word from Proto-Indo-European kolH-so- →Every word from Proto-Slavic kȏlsъ →
klas — Etymology, Origin & Word History | Etymology Explorer