Etymology
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irreparable (adj.)
early 15c., from Old French irréparable (12c.), from Latin irreparabilis "not to be repaired or recovered," from assimilated form of in- "not, opposite of" (see in- (1)) + reparabilis "that can be repaired" (see repair (v.)). Irrepairable, from the English verb, was used 16c.-17c. but seldom was seen after.
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book-burning (n.)

"mass destruction by fire of published material deemed obscene, corrupting, etc.," 1850, from book (n.) + verbal noun from burn (v.). As an adjective, it is attested from 1726 (in John Toland, who was a victim of it).

What an irreparable destruction of History, what a deplorable extinction of arts and inventions, what an unspeakable detriment to Learning, what a dishonor upon human understanding, has the cowardly proceeding of the ignorant or rather of the interested against unarm'd monuments at all times occasion'd! And yet this Book-burning and Letter-murdring humor, tho far from being commanded by Christ, has prevail'd in Christianity from the beginning .... [John Toland, "The History of the Druids," 1726]
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racist (n.)

1932 (as an adjective from 1938), from race (n.2) + -ist. Racism (q.v.) is in use by 1928, originally in the context of fascist theories, and common from 1936. These words replaced earlier racialism (1882) and racialist (1910), both often used early 20c. in a British or South African context. There are isolated uses of racism from c. 1900.

Returning recently from a six months' visit to Europe, the Rev. John LaFarge, noted Catholic writer, warned at a dinner given in his honor that the destructive forces of "racism" are increasing in the United States, and that they could cause irreparable harm among the American people if immediate steps are not taken to combat them.
Father LaFarge said that American racism is directed principally against Negroes, Jews, and foreigners. He described it as "the pale but venomous cousin" of Nazi racism. Like its Nazi counterpart, he added, it has erected impassable barriers between extensive regions and large groups of people, has formed its own myths and moulded its own social institutions, and above all has come consistently into conflict with Christian teachings. [Opportunity, Journal of Negro Life, vol. XVII, No. 2, Feb. 1939]

Earlier, race hatred (1852 of the Balkans, 1858 of British India, 1861 of white and black in America), race prejudice (1867 of English in India, 1869 of white and black in America, 1870 of the English toward Irish) were used, and, especially in 19c. U.S. political contexts, negrophobia. Anglo-Saxonism as "belief in the superiority of the English race" had been used (disparagingly) from 1860. Anti-Negro (adj.) is attested in British and American English from 1819.

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