Where does “Kalas” come from?

Kalas (English) comes from Hungarian kalász, from Slovak klas, from Proto-Slavic kȏlsъ, from Proto-Indo-European kolH-so-.

Ancestry of “Kalas”, step by step

StepLanguageWordMeaning
1Hungariankalászear, spike the fruiting body of a grain plant
2Slovakklasear
3Proto-Slavickȏlsъear (of grain)
4Proto-Indo-EuropeankolH-so-—
Every word from Proto-Indo-European kolH-so- →Every word from Proto-Slavic kȏlsъ →Every word from Slovak klas →