Where does “*keruɨn” come from?

*keruɨn (Proto-Brythonic) comes from Vulgar Latin *cerēna, from Latin carina, from Proto-Indo-European ḱerh₂- — head, top; horn.

Ancestry of “*keruɨn”, step by step

StepLanguageWordMeaning
1Vulgar Latin*cerēna
2Latincarinakeel of a ship; ship
3Proto-Indo-Europeanḱerh₂-head, top; horn

Words derived from “*keruɨn

Every word from Proto-Indo-European ḱerh₂-Every word from Latin carinaEvery word from Vulgar Latin *cerēna