Where does “quadrimillennial” come from?

quadrimillennial (English) comes from English millennial, from Late Latin millennium, 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.

quadrimillennial (English): Occurring every four thousand years

Definitions

  1. Occurring every four thousand years

Ancestry of “quadrimillennial”, step by step

StepLanguageWordMeaning
1EnglishmillennialReferring to the 1,000th anniversary of an event...
2Late Latinmillenniummillennium
3Latin-enniumforming periods of years
4Latin-ennis
5Latinannusyear; time; season
6Proto-Italicatnosyear
7Proto-Indo-Europeanh₂et-no-
8Proto-Indo-Europeanh₂et-grass
Every word from Proto-Indo-European h₂et-Every word from Proto-Indo-European h₂et-no-Every word from Proto-Italic atnos