Where does “hirion” come from?

hirion (Welsh) comes from Welsh hir, from Proto-Brythonic hir, from Proto-Celtic sīros, from Proto-Indo-European seh₁-ró-s, from Proto-Indo-European seh₁- — to impress, insert; to sow, to plant; long,...

Ancestry of “hirion”, step by step

StepLanguageWordMeaning
1Welshhirlong; h-prothesized form of ir
2Proto-Brythonichirlong, tall
3Proto-Celticsīroslong
4Proto-Indo-Europeanseh₁-ró-s—
5Proto-Indo-Europeanseh₁-to impress, insert; to sow, to plant; long,...
Every word from Proto-Indo-European seh₁- →Every word from Proto-Indo-European seh₁-ró-s →Every word from Proto-Celtic sīros →