Etymology: centenarian
Today, my dear sweet grandma is 100 years old! Although I credit my grandfather for my love of words, anything that’s practical, skillful, witty or quietly nourishing about me I owe to my amazing grandma Betty. Due to quarantine rules, we are unable to celebrate this momentous day with her in person, so we’ll settle for a family Zoom video call. She’s currently dealing with a positive diagnosis for COVID-19, but is blessedly asymptomatic and her doctors are optimistic that she will stay that way. Still, we welcome any good thoughts to be sent her way!

Though she will likely shy away from any acknowledgement of this achievement in her usual mildly self-deprecating way, it’s obviously quite a big deal to those of us who love her. She is now a centenarian! Has a nice distinguished ring to it doesn’t it? The first recorded use of the word was in 1805. Prior to that, people used the word centenary either as an adjective to describe things related to or consisting of 100 years, or as a noun to describe a period of 100 years or the celebration of a hundredth anniversary. This word is still used in British English, but in America we tend to use the word centennial.
Both centenary and centenarian come from Latin centenarius, which formed from the word centum, meaning “hundred.”
As an aside, the English word hundred comes from a Proto-Germanic word, *hundam. The Proto Indo European root for both centum and hundam is the word, *dekm-, which actually means 10. This PIE root gives us a clue as to how the somewhat different sounding words centum and hundam happened. There’s this thing in spoken language where consonant sounds evolve over time, often due to people skipping or combining sounds to speed up speech. There are lots of different ways and reasons why this happens. (Here’s a good wikipedia article about it for those interested.) Basically people added some suffixes to *dekm- to multiply it for use as the number 100. Latin ended up with the one that sounded more like satam or centum, and Proto-Germanic ended up with the one that sounded more like hundam. Language is weird.
Anyhow, I’m happy to be celebrating my favorite centenarian today. 100 years of Betty is never really enough, but I’ll take it. Here’s to 100 more!


