Where does “grâuț” come from?

grâuț (Romanian) comes from Romanian grâu, 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.

Ancestry of “grâuț”, step by step

Step	Language	Word	Meaning
1	Romanian	grâu	wheat; grain, cereal, corn
2	Latin	grānum	grain, seed, small kernel
3	Proto-Italic	grānom	grain
4	Proto-Indo-European	ǵr̥h₂nóm	grain
5	Proto-Indo-European	ǵr̥h₂nós	matured, grown old
6	Proto-Indo-European	ǵerh₂-	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 →