Where does “ânuo” come from?

ânuo (Portuguese) comes from Latin annuus, from Latin annus, from Proto-Italic atnos, from Proto-Indo-European h₂et-no-, from Proto-Indo-European h₂et- — grass.

Ancestry of “ânuo”, step by step

Step	Language	Word	Meaning
1	Latin	annuus	annual, yearly; lasting a year
2	Latin	annus	year; time; season
3	Proto-Italic	atnos	year
4	Proto-Indo-European	h₂et-no-	—
5	Proto-Indo-European	h₂et-	grass

Every word from Proto-Indo-European h₂et- →