Italian word caverna comes from Proto-Indo-European *ḱówH-, and later Latin cavus (Excavated, channeled. Hollow, concave.)

Detailed word origin of caverna

Dictionary entry	Language	Definition
*ḱówH-	Proto-Indo-European (ine-pro)
*ḱówHwos	Proto-Indo-European (ine-pro)
cavus	Latin (lat)	Excavated, channeled. Hollow, concave.
caverna	Latin (lat)	Cave, cavern, grotto. Vault, chamber, cleft.
caverna	Italian (ita)	Cave, cavern.

Words with the same origin as caverna