Where does “trireme” come from?

trireme (Italian) comes from Latin trirēmis, from Latin tri-, from Latin trēs, from Proto-Italic trēs, from Proto-Indo-European *tréyes.

trireme (Italian): trireme

Definitions

Step	Language	Word	Meaning
1	Latin	trirēmis	—
2	Latin	tri-	three, tri-
3	Latin	trēs	—
4	Proto-Italic	trēs	three
5	Proto-Indo-European	*tréyes	—

trireme — Etymology, Origin & Word History | Etymology Explorer