Where does “nez” come from?

nez (Middle Breton) comes from Old Breton nith, from Proto-Brythonic nɨθ, from Proto-Italic nizdos, from Proto-Indo-European nisdós, from Proto-Indo-European h₁ni, from Proto-Indo-European h₁én — in.

Ancestry of “nez”, step by step

Step	Language	Word	Meaning
1	Old Breton	nith	—
2	Proto-Brythonic	nɨθ	nest
3	Proto-Italic	nizdos	nest
4	Proto-Indo-European	nisdós	nest
5	Proto-Indo-European	h₁ni	down
6	Proto-Indo-European	h₁én	in

Words derived from “nez”

neizh
neizhiad

Every word from Proto-Indo-European h₁én →Every word from Proto-Indo-European h₁ni →Every word from Proto-Indo-European nisdós →