Where does “terno” come from?

terno (Tagalog) comes from Spanish terno, from Latin ternus, from Latin ter, from Latin terr, from Old Latin tris, from Proto-Italic trēs, from Proto-Indo-European *tréyes.

terno (Tagalog): set of things used together due to similar design or color making a suitable pair

Definitions

set of things used together due to similar design or color making a suitable pair

Ancestry of “terno”, step by step

Step	Language	Word	Meaning
1	Spanish	terno	set of three, trio; three-piece suit; suit
2	Latin	ternus	triple, threefold, trinary; three each
3	Latin	ter	thrice
4	Latin	terr	—
5	Old Latin	tris	—
6	Proto-Italic	trēs	three
7	Proto-Indo-European	*tréyes	—

Every word from Proto-Indo-European *tréyes →Every word from Proto-Italic trēs →Every word from Old Latin tris →