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imperturbable

[im-per-tur-buh-buh l]
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adjective
  1. incapable of being upset or agitated; not easily excited; calm: imperturbable composure.
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Origin of imperturbable

1490–1500; < Late Latin imperturbābilis. See im-2, perturbable
Related formsim·per·turb·a·bil·i·ty, im·per·turb·a·ble·ness, nounim·per·turb·a·bly, adverb

Synonyms

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composed, collected, impassive, cool, unmoved.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for imperturbability

Historical Examples

  • We all looked at Mr. Blair, who gazed with imperturbability at Waters.

    In a Steamer Chair and Other Stories

    Robert Barr

  • He gazed on us from behind the mask of his Indian imperturbability.

    The Forest

    Stewart Edward White

  • He was determined to break down the other's wall of imperturbability.

    The Grell Mystery

    Frank Froest

  • Nothing kept him in check save the imperturbability of the seated figure.

    Prairie Folks

    Hamlin Garland

  • Quasimodo had resumed, to all appearance, his first imperturbability.


British Dictionary definitions for imperturbability

imperturbable

adjective
  1. not easily perturbed; calm; unruffled
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Derived Formsimperturbability or imperturbableness, nounimperturbably, adverbimperturbation (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

Word Origin and History for imperturbability

imperturbable

adj.

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.

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Online Etymology Dictionary, © 2010 Douglas Harper