1 -ennial | Definition of -ennial
-en·​nial | \ ¦enÄ“É™l, ¦enyÉ™l\

Definition of -ennial

: recurring at or marking intervals of (so many) years biennial centennial

History and Etymology for -ennial

Middle English -eniale, from Middle French -ennial, from Latin -ennium (as in biennium period of two years) + Middle French -al

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