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unspeakable

[uhn-spee-kuh-buhl]
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adjective
  1. not speakable; that may not be spoken.
  2. exceeding the power of speech; unutterable; inexpressible; indescribable.
  3. inexpressibly bad or objectionable.
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Origin of unspeakable

1350–1400; Middle English unspekeabill. See un-1, speakable
Related formsun·speak·a·ble·ness, nounun·speak·a·bly, adverb

Synonyms for unspeakable

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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018


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British Dictionary definitions for unspeakable

unspeakable

adjective
  1. incapable of expression in wordsunspeakable ecstasy
  2. indescribably bad or evil
  3. not to be utteredunspeakable thoughts
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Derived Formsunspeakableness, noununspeakably, adverb
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 unspeakable

adj.

c.1400, "inexpressible," from un- (1) "not" + speakable (see speak). Meaning "indescribably bad or wicked" is recorded from 1831. Related: Unspeakably.

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Online Etymology Dictionary, © 2010 Douglas Harper