Simple Definition of imperturbable
: very calm : very hard to disturb or upset
Examples of imperturbable in a sentence
Although he seems outwardly imperturbable, he can get very angry at times.
<the chef was absolutely imperturbable—even when the kitchen caught on fire>
Did You Know?
There is an interesting time lag between the appearance of "imperturbable" and its antonym, "perturbable." Although "imperturbable" is known to have existed since the middle of the 15th century, "perturbable" didn't show up in written English until 1800. The verb "perturb" (meaning "to disquiet" or "to throw into confusion") predates both "imperturbable" and "perturbable"; it has been part of English since the 14th century. All three words derive from Latin perturbare (also meaning "to throw into confusion"), which in turn comes from the combination of per- and turbare, which means "to disturb." Other relatives of "imperturbable" include "disturb" and "turbid."
Origin and Etymology of imperturbable
Middle English, from Late Latin imperturbabilis, from Latin in- + perturbare to perturb
First Known Use: 15th century
Synonym Discussion of imperturbable
IMPERTURBABLE Defined for Kids
Definition of imperturbable for Students
: hard to disturb or upset : very calm <an imperturbable teacher>
Seen and Heard
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