Where does “furnārius” come from?

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

Ancestry of “furnārius”, step by step

Step	Language	Word	Meaning
1	Latin	furnus	oven; bakery
2	Proto-Italic	fornos	—
3	Proto-Indo-European	gʷʰr̥-nós	—
4	Indo-European	*gʷʰer-	—

furnārius — Etymology, Origin & Word History | Etymology Explorer