Where does “trentennio” come from?

trentennio (Italian) comes from Italian -ennio, from Latin -ennium, from Latin -ennis, from Latin annus, from Proto-Italic atnos, from Proto-Indo-European h₂et-no-, from Proto-Indo-European h₂et- — grass.

trentennio (Italian): a period of thirty years

Definitions

  1. a period of thirty years

Ancestry of “trentennio”, step by step

StepLanguageWordMeaning
1Italian-ennioforms nouns from numbers, meaning "period of ~ years"
2Latin-enniumforming periods of years
3Latin-ennis—
4Latinannusyear; time; season
5Proto-Italicatnosyear
6Proto-Indo-Europeanh₂et-no-—
7Proto-Indo-Europeanh₂et-grass
Every word from Proto-Indo-European h₂et- →Every word from Proto-Indo-European h₂et-no- →Every word from Proto-Italic atnos →