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irrefrangible

[ir-i-fran-juh-buh l]
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adjective
  1. not to be broken or violated; inviolable: an irrefrangible rule of etiquette.
  2. incapable of being refracted.
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Origin of irrefrangible

First recorded in 1710–20; ir-2 + refrangible
Related formsir·re·fran·gi·bil·i·ty, ir·re·fran·gi·ble·ness, nounir·re·fran·gi·bly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for irrefrangible

durable, perpetual, immortal, unambiguous, precise, undeniable, convincing, indisputable, compelling, unmistakable, decisive, irrefutable, irrevocable, abiding, deathless, enduring, everlasting, immutable, imperishable, incorruptible
British Dictionary definitions for irrefrangible

irrefrangible

adjective
  1. not to be broken or transgressed; inviolable
  2. physics incapable of being refracted
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Derived Formsirrefrangibility or irrefrangibleness, nounirrefrangibly, 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 irrefrangible

adj.

c.1719, "that cannot be broken," from assimilated form of in- "not, opposite of" (see in- (1)) + refrangible.

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Online Etymology Dictionary, © 2010 Douglas Harper