• synonyms


[in-di-sur-nuh-buh l, -zur-]
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  1. not discernible; that cannot be seen or perceived clearly; imperceptible.
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Origin of indiscernible

First recorded in 1625–35; in-3 + discernible
Related formsin·dis·cern·i·ble·ness, in·dis·cern·i·bil·i·ty, nounin·dis·cern·i·bly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for indiscernible

indistinct, obscure, vague

Examples from the Web for indiscernible

Historical Examples of indiscernible

  • He had no notion of the time; the golden hands of his watch were indiscernible in the gloom.

    The Return

    Walter de la Mare

  • For at first he had lain outstretched on the ground, hidden and indiscernible, like those who lie in wait for swamp-game.

    Thus Spake Zarathustra

    Friedrich Nietzsche

  • We could almost say, not only the same power, but the same sort of power, is indiscernible in Haydn and Mozart.

  • Control was full of people; Air Force brass, technicians, observers, enlisted men of indiscernible purpose.

  • His eyes and nose were gone—in fact his features were indiscernible—but he was not mortally injured.

British Dictionary definitions for indiscernible


  1. incapable of being discerned
  2. scarcely discernible or perceptible
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Derived Formsindiscernibleness or indiscernibility, nounindiscernibly, 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 indiscernible


1630s, from in- (1) "not, opposite of" + discernible. Related: Indiscernibly; indiscernibility.

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Online Etymology Dictionary, © 2010 Douglas Harper