Where does “decennium” come from?

decennium (English) comes from English decennial, from Latin decennialis, 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.

decennium (English): A period of ten years

Definitions

  1. A period of ten years

Ancestry of “decennium”, step by step

decennium traces back through two separate lines of ancestry.

via English decennial

StepLanguageWordMeaning
1EnglishdecennialThe tenth anniversary of an event or happening;...
2Latindecennialis—
3Latin-enniumforming periods of years
4Latin-ennis—
5Latinannusyear; time; season
6Proto-Italicatnosyear
7Proto-Indo-Europeanh₂et-no-—
8Proto-Indo-Europeanh₂et-grass

via Latin decennium

StepLanguageWordMeaning
1Latindecenniumdecennium; decade
2Latindecennisdecennial, of ten years
3Latindecemten; 10
4Latin-nus-an
5Proto-Italic-nosCreates verbal adjectives from verb stems
6Proto-Indo-European-nósCreates verbal adjectives from roots
Every word from Proto-Indo-European h₂et- →