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irrefrangible - 4 dictionary results

ir⋅re⋅fran⋅gi⋅ble

[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


ir⋅re⋅fran⋅gi⋅bil⋅i⋅ty, ir⋅re⋅fran⋅gi⋅ble⋅ness, noun
ir⋅re⋅fran⋅gi⋅bly, adverb
ir·re·fran·gi·ble   (ĭr'ĭ-frān'jə-bəl)   
adj.  
  1. Impossible to break; indestructible: irrefrangible cookware.
  2. Physics That cannot be refracted.
ir're·fran'gi·bly adv.

Irrefrangible

Ir`re*fran"gi*ble\, a. Not refrangible; that can not be refracted in passing from one medium to another. -- Ir`re*fran"gi*ble*ness, n.

irrefrangible 
c.1719, "that cannot be broken," from in- "not" + refrangible, from re- "back" + L. frangere "to break" (see fraction).
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