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[in-di-sur-nuh-buh l, -zur-] /ˌɪn dɪˈsɜr nə bəl, -ˈzɜr-/
not discernible; that cannot be seen or perceived clearly; imperceptible.
Origin of indiscernible
First recorded in 1625-35; in-3 + discernible
Related forms
indiscernibleness, indiscernibility, noun
indiscernibly, adverb Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for indiscernible
Historical Examples
  • 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.

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

  • We do not show it in the drawing, as it would be indiscernible, coming very close to A′ X.

  • The trail was like a softened stripe; footprints might be there, merged into the pattern till they were indiscernible.

    Bulldog Carney W. A. Fraser
  • His way lay across a range of hills, the road over which was so blocked up with snow as to leave all trace of it indiscernible.

  • By the time sexual maturity is attained the dorsal pattern often is indiscernible or represented only by faint traces.

  • Between lips that stirred so little their movement must have been indiscernible, he asked: "Who?"

    Alias The Lone Wolf Louis Joseph Vance
British Dictionary definitions for indiscernible


incapable of being discerned
scarcely discernible or perceptible
Derived Forms
indiscernibleness, indiscernibility, noun
indiscernibly, 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
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Word Origin and History for indiscernible

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

Online Etymology Dictionary, © 2010 Douglas Harper
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