quinquennial

Estimated CEFR level: C2 — Proficiency

Estimated from word frequency; not an official CEFR classification.

Etymology

Borrowed from Latin quīnquenniālis, from quīnquennium (“5-year period”) + -ālis, from quīnquennis (“5-year”) + -ium (“-ium: forming abstract nouns”), from quīnque (“five”) + annus (“year”) + -is (suffix forming compound adjectives).

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