Where does “tergeminus” come from?

tergeminus (Latin) comes from Latin ter, from Latin terr, from Old Latin tris, from Proto-Italic trēs, from Proto-Indo-European *tréyes.

tergeminus (Latin): triplet

Definitions

tergeminus traces back through two separate lines of ancestry.

Step	Language	Word	Meaning
1	Latin	ter	thrice
2	Latin	terr	—
3	Old Latin	tris	—
4	Proto-Italic	trēs	three
5	Proto-Indo-European	*tréyes	—

Step	Language	Word	Meaning
1	Latin	Geminus	twinborn, twin
2	Latin	geminus	twin; double, paired; a twin
3	Proto-Italic	jemanos	—
4	Proto-Indo-European	yemH-	twin