It's the word of the day for March 10.
Today's word is imperturbable, spelled I-M-P-E-R-T-U-R-B-A-B-L-E.
Impreturbable is an adjective.
It describes someone or something marked by extreme calm,
such as a person or thing that is very hard to disturb or upset.
Here's the word used in a sentence from The Daily Californian by David Cohn.
The thick heat is not letting up after a long stretch of nearly 90 degree days,
though the crowd has not seemed to notice.
Instead,
these thousands of people emanate a truly imperturbable energy
as they get to see Gospel legend Mavis Staples for free.
The word imperturbable is a bit of a mouthful, but don't let its five syllables perturb you.
Instead, let us break it down.
This word, as well as its antonym, perturbable,
comes from the Latin verb perturbare, meaning to agitate trouble or throw into confusion.
Perturbare comes in turn from the combination of pair,
meaning thoroughly, and terbare, meaning to disturb.
Unsurprisingly, perturbare is also the source of the English verb perturb.
Other perturbare descendants include disturb, as in to destroy, the tranquility or composure of,
and turbid, meaning thick or opaque, with or as if with roiled sediment.