Where does “fornix” come from?

Fornix comes from Latin fornix, meaning an arch or vault structure.

fornix (English): An archlike structure or fold; Specifically, the...

Definitions

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

fornix — Etymology, Origin & Word History | Etymology Explorer