Where does “grau” come from?

grau (Portuguese) comes from Old Portuguese grão, from Latin grānum, from Proto-Italic grānom, from Proto-Indo-European ǵr̥h₂nóm, from Proto-Indo-European ǵr̥h₂nós, from Proto-Indo-European ǵerh₂- — to grow old, to mature.

grau (Portuguese): degree; academic degree; degree of a polynomial

Definitions

  1. degree; academic degree; degree of a polynomial

Ancestry of “grau”, step by step

StepLanguageWordMeaning
1Old Portuguesegrão—
2Latingrānumgrain, seed, small kernel
3Proto-Italicgrānomgrain
4Proto-Indo-Europeanǵr̥h₂nómgrain
5Proto-Indo-Europeanǵr̥h₂nósmatured, grown old
6Proto-Indo-Europeanǵerh₂-to grow old, to mature

Words derived from “grau”

Every word from Proto-Indo-European ǵerh₂- →Every word from Proto-Indo-European ǵr̥h₂nós →Every word from Proto-Indo-European ǵr̥h₂nóm →