1793, "to corrupt or undermine the morals of," from French démoraliser, from de- "remove" (see de-) + morale (see morale). Said to be a coinage of the French Revolution. Sense of "lower the morale of, deprive of courage and confidence" (originally especially in reference to armed forces) is attested by 1842; in colloquial use, "to throw into confusion generally." Also demoralise. Related: Demoralized; demoralizing; demoralization.
sink to wash food, dishes, etc., 1824. Phrase everything but (or and) the kitchen sink is attested from 1944, from World War II armed forces slang, in reference to intense bombardment.
Out for blood, our Navy throws everything but the kitchen sink at Jap vessels, warships and transports alike. [Shell fuel advertisement, Life magazine, Jan. 24, 1944]
Earlier was everything but the kitchen stove (1919).
1610s, "to sympathize as brothers," from French fraterniser, from Medieval Latin fraternizare, from Latin fraternus "brotherly" (see fraternity). Military sense of "cultivate friendship with enemy troops" is from 1897 (used in World War I with reference to the Christmas Truce). Used oddly in World War II armed forces jargon to mean "have sex with women from enemy countries" as a violation of military discipline.
A piece of frat, Wren-language for any attractive young woman — ex-enemy — in occupied territory. [John Irving, "Royal Navalese," 1946]
Related: Fraternized; fraternizing.
1540s, "body of soldiers," 1540s, from French troupe, from Old French trope "band of people, company, troop, crowd" (13c.), a word of uncertain origin, perhaps from Frankish *throp "assembly, gathering of people" or another Germanic source, perhaps related to Old English ðorp, Old Norse thorp "village" (see thorp). OED derives the French word from Latin troppus "flock," which is of unknown origin but also might be from the proposed Germanic source. Of groups of animals from 1580s. Specifically as "a subdivision of a cavalry force" from 1580s; of Boy Scouts from 1908. Troops "armed forces" is from 1590s.
Meanings "power to convince the mind" and "power exerted against will or consent" are from mid-14c. Meaning "body of armed men, a military organization" first recorded late 14c. (also in Old French). Physics sense is from 1660s; force field attested by 1920. Related: Forces.
1826 (adj.), "eight-footed or eight-armed;" 1835 (n.) "an eight-footed or eight-armed animal," especially an octopus, from Latinized form of Greek oktōpod-, stem of oktōpous (see octopus).