Where does “furnus” come from?

furnus (Latin) comes from Proto-Italic fornos, from Proto-Indo-European gʷʰr̥-nós, from Indo-European *gʷʰer-.

furnus (Latin): oven; bakery

Definitions

Step	Language	Word	Meaning
1	Proto-Italic	fornos	—
2	Proto-Indo-European	gʷʰr̥-nós	—
3	Indo-European	*gʷʰer-	—

furnus — Etymology, Origin & Word History | Etymology Explorer