Where does “multianual” come from?

multianual (Romanian) comes from Romanian anual, from French annuel, from Late Latin annualis, from Latin annus, from Proto-Italic atnos, from Proto-Indo-European h₂et-no-, from Proto-Indo-European h₂et- — grass.

multianual (Romanian): multiannual

Definitions

multiannual

Ancestry of “multianual”, step by step

Step	Language	Word	Meaning
1	Romanian	anual	annual
2	French	annuel	annual, yearly
3	Late Latin	annualis	one-year-old
4	Latin	annus	year; time; season
5	Proto-Italic	atnos	year
6	Proto-Indo-European	h₂et-no-	—
7	Proto-Indo-European	h₂et-	grass

Every word from Proto-Indo-European h₂et- →Every word from Proto-Indo-European h₂et-no- →Every word from Proto-Italic atnos →