The only free and comprehensive online etymological dictionary of the Spanish language
nariz f. (Noun) "nose"
12th cent. Originally meaning "nostril." From Vulgar Latin *naricæ "nostrils," from Latin naris "nostril." From Proto-Italic *nās-i- 'id.' From Proto-Indo-European *Hneh2-s- 'id.' From a root *Hneh2- "to breathe" (whence alma).
Indo-European
Romance
Asturian nariz, Portuguese nariz, Galician nariz, Catalan nariu, French narine, Italian narice, Aromanian nare, Romanian nară, Sardinian nare
Germanic
Old Norse nǫs "nostril," Old High German nasa "nose," Old Saxon nasa-druppo "cold," Old English nasu "nose" (English nose)
Balto-Slavic
Church Slavic nosъ "nose," Russian nos' 'id.,' Czech nos 'id.,' Polish nos 'id.,' Slovene nọ̑s 'id.,' Old Prussian nozy 'id.,' Lithuanian nósis 'id.,' Latvian nãss 'id.'
Indo-Iranian
Sanskrit nas- "nose," Young Avestan nā̊ŋha "nose," note that the word is in the dual

The word naríz may in fact be a remnant of a Proto-Indo-European ablaut with a root-vowel *a. This is controversial at best, and not reflected in the etymologies in our dictionary, however the bare possibility demands mentioning. "Although the evidence is sparse, it appears that roots with a as fundamental vowel also ablauted. The root *sal- 'salt' had a zero-grad *sl̥-...; the root *nas- 'nose' has a lengthened-grade derivatives such as Latin nār-ēs and English nose, both from *nās-; and the root *laku- 'body of water' (Lat. lacus 'lake', Gk. lákkos 'pond') had an o-grade form *loku- that became Scottish Gaelic loch 'lake'. The view that roots in a ablauted is not universally accepted, but these forms are difficult to explain otherwise." ~ B. Fortson, Indo-European Language and Culture (2011)