The Collaborative International Dictionary
Irrefrangible
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.
Douglas Harper's Etymology Dictionary
irrefrangible
c.1719, "that cannot be broken," from assimilated form of in- "not, opposite of" (see in- (1)) + refrangible.
Wiktionary
irrefrangible
a. 1 Not to broken or transgressed; inviolable. 2 (context physics English) Incapable of being refracted.
Usage examples of "irrefrangible".
Concentric shells of color expanded around Rubeus, but he stood arrogant and irrefrangible as a rock.
Nothing but Hope stayed there in her stout, irrefrangible dwelling, Under the lip of the jar, inside, and she never would venture Outdoors, having the lid of the vessel itself to prevent her, Willed there by Zeus, who arranges the storm clouds and carries the aegis.