Where does “нос” come from?

нос (Bulgarian) comes from Old Church Slavonic носъ, from Proto-Slavic nȍsъ, from Proto-Balto-Slavic nasús, from Proto-Indo-European néh₂s- — nose, nostril.

нос (Bulgarian): nose; toe; bow, head, prow

Definitions

nose; toe; bow, head, prow

Ancestry of “нос”, step by step

Step	Language	Word	Meaning
1	Old Church Slavonic	носъ	nose
2	Proto-Slavic	nȍsъ	nose
3	Proto-Balto-Slavic	nasús	nose
4	Proto-Indo-European	néh₂s-	nose, nostril

Words derived from “нос”

носорог
носер
носле
но́сен
смъртоносен
птица носорог

Every word from Proto-Indo-European néh₂s- →Every word from Proto-Balto-Slavic nasús →Every word from Proto-Slavic nȍsъ →