Where does “contraereo” come from?

contraereo (Italian) comes from Italian contra-, from Latin contrā, from Latin ubī, from Latin cubī, from Proto-Italic *kʷuðei.

contraereo (Italian): anti-aircraft

Definitions

Step	Language	Word	Meaning
1	Italian	contra-	contra-
2	Latin	contrā	—
3	Latin	ubī	—
4	Latin	cubī	—
5	Proto-Italic	*kʷuðei	—

contraereo — Etymology, Origin & Word History | Etymology Explorer