The story
- Latin · borrowed fromdecennālia
- English todaydecennalia
From Latin decennālia, from decennium (“10-year period”) + -ālia (“-alia: forming the names of festivals”), from decennis (“10-year”) + -ium (“-ium: forming abstract nouns”). Equivalent to decennium + -alia.
Etymology from Wiktionary, CC BY-SA 4.0.