Where does “greunen” come from?

greunen (Cornish) comes from Cornish greun, from Proto-Brythonic grọn, from Proto-Celtic grānom, from Proto-Indo-European ǵr̥h₂nóm, from Proto-Indo-European ǵr̥h₂nós, from Proto-Indo-European ǵerh₂- — to grow old, to mature.

Ancestry of “greunen”, step by step

StepLanguageWordMeaning
1Cornishgreungrain
2Proto-Brythonicgrọngrain
3Proto-Celticgrānomgrain
4Proto-Indo-Europeanǵr̥h₂nómgrain
5Proto-Indo-Europeanǵr̥h₂nósmatured, grown old
6Proto-Indo-Europeanǵerh₂-to grow old, to mature
Every word from Proto-Indo-European ǵerh₂- →Every word from Proto-Indo-European ǵr̥h₂nós →Every word from Proto-Indo-European ǵr̥h₂nóm →