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[im-per-tur-buh-buh l] /ˌɪm pərˈtɜr bə bəl/
incapable of being upset or agitated; not easily excited; calm:
imperturbable composure.
Origin of imperturbable
1490-1500; < Late Latin imperturbābilis. See im-2, perturbable
Related forms
imperturbability, imperturbableness, noun
imperturbably, adverb
composed, collected, impassive, cool, unmoved. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for imperturbably
Historical Examples
  • Christian was steadily cheerful that morning, imperturbably practical.

    The Slave Of The Lamp Henry Seton Merriman
  • "Be patient; the time will come," Jean imperturbably replied.

    The Downfall Emile Zola
  • Peter tried to find the speakers with his gaze for a moment and then went on imperturbably.

    The Vagrant Duke George Gibbs
  • "I did the best for you and the Company," said Makola, imperturbably.

    Tales of Unrest Joseph Conrad
  • "This is true in every particular," said Croustillac imperturbably.

  • "That's another thing the boys taught us," replied Polly imperturbably.

    Peggy Stewart at School

    Gabrielle E. Jackson
  • "Showed they knew their business," returned Zeke imperturbably.

    Jewel Clara Louise Burnham
  • "That wouldn't have settled the matter," continued Bradley, imperturbably.

  • She was so absolutely, imperturbably grave that no one dared to laugh.

    About Peggy Saville Mrs. G. de Horne Vaizey
  • "—and then invite them to a party," Blue Bonnet went on imperturbably.

British Dictionary definitions for imperturbably


not easily perturbed; calm; unruffled
Derived Forms
imperturbability, imperturbableness, noun
imperturbably, adverb
imperturbation (ˌɪmpɜːtɜːˈbeɪʃən) noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for imperturbably



c.1500, from Middle French imperturbable and directly from Late Latin imperturbabilis "that cannot be disturbed" (Augustine), from assimilated form of in- "not, opposite of" (see in- (1)) + *perturbabilis, from Latin perturbare "to confuse, disturb" (see perturb). Related: Imperturbably; imperturbability.

Online Etymology Dictionary, © 2010 Douglas Harper
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