Skip to the word

Added 10 October 2026

decennium

/dɪˈsɛnɪəm/ noun

Latin root: decennium Wiktionary

noun Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about decennium at Wordnik → Where our words come from →

A period of 10 years.

Origin

From Latin decennium, from decennis (“10-year”) + -ium (suffix forming abstract nouns), from deciēs (“ten times”) + annus (“year”) + -is (suffix forming compound adjectives). Equivalent to decennial + -ium.

From Wiktionary, via Kaikki.org (CC BY-SA)

Back to today's word