Where does “contraretiarius” come from?

contraretiarius (Latin) comes from Latin contrā, from Latin ubī, from Latin cubī, from Proto-Italic *kʷuðei — where.

contraretiarius (Latin): A net-fighting opponent; the opponent of a...

Definitions

contraretiarius traces back through two separate lines of ancestry.

Step	Language	Word	Meaning
1	Latin	contrā	against
2	Latin	ubī	where? in what place?, in which place?
3	Latin	cubī	—
4	Proto-Italic	*kʷuðei	where

Step	Language	Word	Meaning
1	Latin	retiarius	A net-fighter; a gladiator who fights with a net
2	Latin	-ārius	er
3	Proto-Italic	*-āzios	Forms relational adjectives to nouns (and rarely numerals)