Latin word vinum comes from Proto-Indo-European *wóyh₁nom (Wine.)

Detailed word origin of vinum

Dictionary entry	Language	Definition
*wóyh₁nom	Proto-Indo-European (ine-pro)	Wine.
*wīnom	Proto-Italic (itc-pro)	Wine.
vinum	Latin (lat)	(figuratively) a grapevine. (figuratively) grapes. Wine.