Where does “multimillennial” come from?

multimillennial (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.

multimillennial (English): Of or pertaining to more than one millennium

Definitions

  1. Of or pertaining to more than one millennium

Ancestry of “multimillennial”, step by step

multimillennial traces back through two separate lines of ancestry.

via English millennial

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

via English multi

StepLanguageWordMeaning
1EnglishmultiA multituberculate; Neolamprologus multifasciatus
2EnglishmultituberculateHaving molars with multiple rows of cusps; Any of...
3EnglishtuberculateHaving tubercles; Tubercular
4Latintuberculatuswarty, tuberculate
5Latintūberculuma small swelling, bump, or protuberance; a boil, pimple, tubercle
6Latintūbera hump, bump, swelling, protuberance; excrescence
7Proto-Italictūβos
8Proto-Indo-Europeantewh₂-to swell; to crowd; to be strong
Every word from Proto-Indo-European h₂et-
multimillennial — Etymology, Origin & Word History | Etymology Explorer