• synonyms


[ih-ref-ruh-guh-buh l]
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  1. not to be disputed or contested.
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Origin of irrefragable

1525–35; < Late Latin irrefragābilis, equivalent to Latin ir- ir-2 + refragā(rī) to resist, oppose + -bilis -ble
Related formsir·ref·ra·ga·bil·i·ty, ir·ref·ra·ga·ble·ness, nounir·ref·ra·ga·bly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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Examples from the Web for irrefragable

Historical Examples

  • But we put it on the irrefragable logic of the materialist's own premises and conclusions.

    Life: Its True Genesis

    R. W. Wright

  • To her, the authority of the Church was paramount,—was the only irrefragable thing.

    Earl Hubert's Daughter

    Emily Sarah Holt

  • These laws, therefore, I now repeat, and beg of you to observe them as irrefragable.

  • This part of the argument must appear to every reader as irrefragable.

  • The position of each was at once irrefragable and impossible.


    John Morley

British Dictionary definitions for irrefragable


  1. not able to be denied or refuted; indisputable
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Derived Formsirrefragability or irrefragableness, nounirrefragably, adverb

Word Origin

C16: from Late Latin irrefrāgābilis, from Latin ir- + refrāgārī to resist, thwart
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 irrefragable


"that cannot be refuted," 1530s, from Late Latin irrefragabilis, from assimilated form of in- "not, opposite of" (see in- (1)) + Latin refragari "to oppose, contest," from re- "back" (see re-) + frag-, base of frangere "to break" (see fraction). Related: irrefragably; irrefragability.

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Online Etymology Dictionary, © 2010 Douglas Harper