Where does “quadrennially” come from?
quadrennially (English) comes from English quadrennial, from Latin quadriennium, from Latin quadriennis, from Latin annus, from Proto-Italic atnos, from Proto-Indo-European h₂et-no-, from Proto-Indo-European h₂et- — grass.
quadrennially (English): Every four years
Ancestry of “quadrennially”, step by step
Words derived from “quadrennially”