Where does “*klas” come from?

*klas (Proto-Brythonic) comes from Latin classis, from Proto-Italic klāssis, from Proto-Indo-European kelh₁- — to call, cry, summon.

Ancestry of “*klas”, step by step

StepLanguageWordMeaning
1Latinclassisany one of the five divisions into which Servius...
2Proto-Italicklāssis—
3Proto-Indo-Europeankelh₁-to call, cry, summon

Words derived from “*klas”

Every word from Proto-Indo-European kelh₁- →Every word from Proto-Italic klāssis →Every word from Latin classis →