Where does “megamillennium” come from?

megamillennium (English) comes from English millennium, 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.

megamillennium (English): A period of time consisting of a million years

Definitions

  1. A period of time consisting of a million years

Ancestry of “megamillennium”, step by step

megamillennium traces back through two separate lines of ancestry.

via English millennium

StepLanguageWordMeaning
1EnglishmillenniumA period of time consisting of one thousand...
2Late Latinmillenniummillennium
3Latin-enniumforming periods of years
4Latin-ennis
5Latinannusyear; time; season
6Proto-Italicatnosyear
7Proto-Indo-Europeanh₂et-no-
8Proto-Indo-Europeanh₂et-grass

via English mega

StepLanguageWordMeaning
1EnglishmegaVery large; great; excellent
2Ancient Greekμέγαςbig, large; great, mighty, loud; marvelous,...
3Proto-Indo-Europeanmeǵh₂sgreat
Every word from Proto-Indo-European h₂et-