Where does “xero-” come from?

xero- (Italian) comes from Ancient Greek ξηρός, from Proto-Indo-European kseros.

xero- (Italian): xero-

Definitions

Step	Language	Word	Meaning
1	Ancient Greek	ξηρός	dry; The effects of being without water: parched,...
2	Proto-Indo-European	kseros	—

xero- — Etymology, Origin & Word History | Etymology Explorer