centenary

The story

1. Proto-Indo-European*déḱm̥
2. Proto-Indo-European*ḱm̥tóm
3. Proto-Italic*kəntom
4. Latincentum
5. Latincentēnus
6. Latincentēnārius
7. English todaycentenary

From Latin centēnārius (“containing 100; local official overseeing a hundred”), either directly or through French centenaire from centēnī (“100 each”) + -ārius (-ary), from centum (“hundred”). Doublet of centner, kantar, and quintal.

Words from the same roots

First known use, by meaning

• c. 1451 Occurring every 100 years.
• c. 1451 Lasting or aged 100 years, 100-year-old.
• c. 1451 Of or relating to hundreds, the administrative unit.