Where does “quinquennale” come from?
quinquennale (Italian) 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.
quinquennale (Italian): five-year, quinquennial
Ancestry of “quinquennale”, step by step
Words derived from “quinquennale”