Where does “único” come from?

único (Portuguese) comes from Latin ūnicus, from Latin ūnus, from Old Latin oinos, from Proto-Italic oinos, from Proto-Indo-European óynos — one; single.

único (Portuguese): unique; only

Definitions

unique; only

Ancestry of “único”, step by step

Step	Language	Word	Meaning
1	Latin	ūnicus	only, sole, single
2	Latin	ūnus	one, single
3	Old Latin	oinos	one
4	Proto-Italic	oinos	cardinal number 1 Previous: n/a Next: *duō;...
5	Proto-Indo-European	óynos	one; single

Words derived from “único”

unico
unicamente

Every word from Proto-Indo-European óynos →Every word from Proto-Italic oinos →Every word from Old Latin oinos →