Where does “sexennialis” come from?

sexennialis (Latin) comes from Latin sexennium, from Latin sexennis, from Latin annus, from Proto-Italic atnos, from Proto-Indo-European h₂et-no-, from Proto-Indo-European h₂et- — grass.

Ancestry of “sexennialis”, step by step

StepLanguageWordMeaning
1LatinsexenniumA period or span of six years
2Latinsexennissix years old; of six years, lasting six years
3Latinannusyear; time; season
4Proto-Italicatnosyear
5Proto-Indo-Europeanh₂et-no-—
6Proto-Indo-Europeanh₂et-grass

Words derived from “sexennialis”

Every word from Proto-Indo-European h₂et- →Every word from Proto-Indo-European h₂et-no- →Every word from Proto-Italic atnos →