Where does “abotonar” come from?

abotonar (Asturian) comes from Asturian a-, from Latin ūnīre, from Latin ūnus, from Old Latin oinos, from Proto-Italic oinos, from Proto-Indo-European óynos — one; single.

abotonar (Asturian): to button

Definitions

to button

Ancestry of “abotonar”, step by step

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

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