Where does “quinquennal” come from?
quinquennal (French) comes from Latin quinquennalis, from Latin quinquennis, from Latin annus, from Proto-Italic atnos, from Proto-Indo-European h₂et-no-, from Proto-Indo-European h₂et- — grass.
quinquennal (French): quinquennial, five-year
Ancestry of “quinquennal”, step by step
Words derived from “quinquennal”