1680s, from Irish Tuatha dé Danann, literally "the people of Danann," from plural of tuath (see Teutonic) Danann, apparently originally an oblique case of Danu, mother of the gods. "sea-slug eaten as a delicacy in the Western Pacific," 1814, from French bêche-de-mer, literally "spade of the sea," a folk-etymology alteration of Portuguese bicho do mar "sea-slug," literally "worm of the sea. "a single blow or stroke, dispatching one condemned or mortally wounded to put an end to misery," 1690s, from French coup de grce, literally "stroke of grace. Calloway recalled in his autobiography that the song came first and the chorus was later improvised when he forgot the lyrics during a radio broadcast. "the 130th Psalm" (one of the seven penitential psalms), so called for its opening words in Latin, literally "out of the depths (have I cried).
Latin adverb and preposition of separation in space, meaning "down from, off, away from," and figuratively "concerning, by reason of, according to. " (often a euphemism for "to sell"), by 1968, from de- "off, away" accession, which had been used since 1887 in library publications as a verb meaning "to add to a catalogue. "sudden, unforeseen occurrence," 1779, from French coup de foudre, literally "stroke of lightning," also "love at first sight" (see coup).