Where does “stêrioù” come from?

stêrioù (Breton) comes from Breton stêr, from Proto-Brythonic ster, from Proto-Celtic sterā, from Proto-Indo-European h₂stḗr, from Proto-Indo-European h₂eHs- — to be/become dry; to burn, to glow; hearth.

Definitions

Ancestry of “stêrioù”, step by step

StepLanguageWordMeaning
1Bretonstêrriver
2Proto-Brythonicsterstar
3Proto-Celticsterāstar
4Proto-Indo-Europeanh₂stḗrstar
5Proto-Indo-Europeanh₂eHs-to be/become dry; to burn, to glow; hearth
Every word from Proto-Indo-European h₂eHs- →Every word from Proto-Indo-European h₂stḗr →Every word from Proto-Celtic sterā →