Where does “nāsis” come from?

nāsis (Proto-Balto-Slavic) comes from Proto-Indo-European nās-, from Proto-Indo-European néh₂s- — nose, nostril.

Ancestry of “nāsis”, step by step

StepLanguageWordMeaning
1Proto-Indo-Europeannās-—
2Proto-Indo-Europeannéh₂s-nose, nostril
Every word from Proto-Indo-European néh₂s- →Every word from Proto-Indo-European nās- →