im·​per·​turb·​able | \ ˌim-pər-ˈtər-bə-bəl How to pronounce imperturbable (audio) \

Definition of imperturbable

: marked by extreme calm, impassivity, and steadiness : serene

Other Words from imperturbable

imperturbability \ ˌim-​pər-​ˌtər-​bə-​ˈbi-​lə-​tē How to pronounce imperturbable (audio) \ noun
imperturbably \ ˌim-​pər-​ˈtər-​bə-​blē How to pronounce imperturbable (audio) \ adverb

Synonyms & Antonyms for imperturbable



Visit the Thesaurus for More 

Choose the Right Synonym for imperturbable

cool, composed, collected, unruffled, imperturbable, nonchalant mean free from agitation or excitement. cool may imply calmness, deliberateness, or dispassionateness. kept a cool head composed implies freedom from agitation as a result of self-discipline or a sedate disposition. the composed pianist gave a flawless concert collected implies a concentration of mind that eliminates distractions especially in moments of crisis. the nurse stayed calm and collected unruffled suggests apparent serenity and poise in the face of setbacks or in the midst of excitement. harried but unruffled imperturbable implies coolness or assurance even under severe provocation. the speaker remained imperturbable despite the heckling nonchalant stresses an easy coolness of manner or casualness that suggests indifference or unconcern. a nonchalant driver

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- (meaning "thoroughly") and turbare, which means "to disturb." Other relatives of imperturbable include disturb and turbid.

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
Recent Examples on the Web That is especially true for Michaels, who is famously imperturbable under pressure, professorially philosophical about the businesses of comedy and television, and consistently medium-cool in his overall demeanor. Bill Carter For Cnn Business Perspectives, CNN, 9 Sep. 2022 Gerald Kyd also shines as all-seeing, imperturbable Dr. Dorn, whether wearyingly suggesting Arkadina’s ailing brother simply needs to take Paracetamol or thoughtfully dispensing kindness. David Benedict, Variety, 8 July 2022 Inquisitive and imperturbable, Nelly is our guide through the story, which somehow unfolds on her initiative. Anthony Lane, The New Yorker, 21 Apr. 2022 The fat man was still sitting with the same imperturbable calm. Vladimir Sorokin, The New Yorker, 27 Sep. 2021 And the flexibility of the imperturbable Audi mill allows a fifth-gear drive from near idle to redline, a trait reminiscent of the early Lamborghini GTs and one which makes the Spyker a pussycat to drive around town. Robert Ross, Robb Report, 20 Sep. 2021 The Emmy winner stars as Del Harris, the imperturbable police chief in the languishing Rust Belt town of Buell, Pennsylvania. Ew Staff,, 10 Sep. 2021 The slow movement was infused with an imperturbable serenity, perhaps the single most elusive state to achieve in the Hollywood Bowl. Los Angeles Times, 21 Aug. 2021 And, alone among the leading founders, the great imperturbable James Madison thought the country would likely do just fine. Barton Swaim, WSJ, 2 July 2021 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'imperturbable.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of imperturbable

15th century, in the meaning defined above

History and Etymology for imperturbable

Middle English, from Late Latin imperturbabilis, from Latin in- + perturbare to perturb

Learn More About imperturbable

Time Traveler for imperturbable

Time Traveler

The first known use of imperturbable was in the 15th century

See more words from the same century

Listen to Our Podcast About imperturbable

Dictionary Entries Near imperturbable




See More Nearby Entries 

Statistics for imperturbable

Last Updated

14 Sep 2022

Cite this Entry

“Imperturbable.” Dictionary, Merriam-Webster, Accessed 4 Oct. 2022.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

More Definitions for imperturbable


im·​per·​turb·​able | \ ˌim-pər-ˈtər-bə-bəl How to pronounce imperturbable (audio) \

Kids Definition of imperturbable

: hard to disturb or upset : very calm an imperturbable teacher

More from Merriam-Webster on imperturbable

Nglish: Translation of imperturbable for Spanish Speakers


Test Your Vocabulary

Odd Habits and Quirks

  • image1926873504
  • Which of the following best describes an easily irritated person?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

Universal Daily Crossword

A daily challenge for crossword fanatics.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!