irrefrangible

irrefrangible

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

Origin:
1710–20; ir-2 + refrangible

irrefrangibility, irrefrangibleness, noun
irrefrangibly, adverb
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World English Dictionary
irrefrangible (ˌɪrɪˈfrændʒəbəl)
 
adj
1.  not to be broken or transgressed; inviolable
2.  physics incapable of being refracted
 
irrefrangi'bility
 
n
 
irre'frangibleness
 
n
 
irre'frangibly
 
adv

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

irrefrangible
c.1719, "that cannot be broken," from in- "not" + refrangible, from re- "back" + L. frangere "to break" (see fraction).
Online Etymology Dictionary, © 2010 Douglas Harper
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