[ ih-ref-ruh-guh-buh l ]
/ ɪˈrɛf rə gə bəl /


not to be disputed or contested.

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 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for irrefragable

British Dictionary definitions for irrefragable


/ (ɪˈrɛfrəɡəbəl) /


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

Word Origin for irrefragable

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.

Online Etymology Dictionary, © 2010 Douglas Harper