Where does “нур” come from?

нур (Avar) comes from Arabic نُور, from Classical Persian جَان, from Middle Persian 𐫃𐫏𐫀𐫗, from Proto-Iranian *wyaHnáH, from Proto-Indo-Iranian wyaHnás, from Proto-Indo-European h₂enh₁‑ — to breathe.

нур (Avar): rainbow

Definitions

rainbow

Ancestry of “нур”, step by step

Step	Language	Word	Meaning
1	Arabic	نُور	light, brightess; ray of light, light beam;...
2	Classical Persian	جَان	—
3	Middle Persian	𐫃𐫏𐫀𐫗	—
4	Proto-Iranian	*wyaHnáH	—
5	Proto-Indo-Iranian	wyaHnás	—
6	Proto-Indo-European	h₂enh₁‑	to breathe

Every word from Proto-Indo-European h₂enh₁‑ →Every word from Proto-Indo-Iranian wyaHnás →Every word from Proto-Iranian *wyaHnáH →