Where does “21enne” come from?

21enne (Italian) comes from Italian -enne, from Latin -ennis, from Latin annus, from Proto-Italic atnos, from Proto-Indo-European h₂et-no-, from Proto-Indo-European h₂et- — grass.

Ancestry of “21enne”, step by step

StepLanguageWordMeaning
1Italian-enne-year-old; Also forms similar terms related to...
2Latin-ennis—
3Latinannusyear; time; season
4Proto-Italicatnosyear
5Proto-Indo-Europeanh₂et-no-—
6Proto-Indo-Europeanh₂et-grass
Every word from Proto-Indo-European h₂et- →