avocadoyoudaoicibaDictYouDict
avocado: [17] Anyone tucking into an avocado could well be taken aback to learn that in the South American Indian language from which the word originally came, it meant literally ‘testicle’. The Nahuatl Indians named the fruit ahuacatl ‘testicle’ on account of its shape. The Spanish conquistadors took the word over as aguacate, but before long this became altered by folk etymology (the substitution of familiar for unfamiliar forms) to avocado (literally ‘advocate’ in Spanish).

When English borrowed the word, folk etymology took a hand yet again, for in the late 17th century it became known as the alligator pear, a name which survived into the 20th century.
air raid (n.)youdaoicibaDictYouDict
1914, from air (n.1) + raid (n.); originally in reference to British attacks Sept. 22, 1914, on Zeppelin bases at Cologne and Düsseldorf in World War I. The German word is Fliegerangriff "aviator-attack," and if Old English had survived into the 20th century our word instead might be fleogendeongrype.
One didn't dare to inhale for fear of breathing it in. It was the sound of eighteen hundred airplanes approaching Hamburg from the south at an unimaginable height. We had already experienced two hundred or even more air raids, among them some very heavy ones, but this was something completely new. And yet there was an immediate recognition: this was what everyone had been waiting for, what had hung for months like a shadow over everything we did, making us weary. It was the end. [Hans Erich Nossack, "Der Untergang," 1942]
hat trick (n.)youdaoicibaDictYouDict
in the sports sense, 1879, originally in cricket, "taking three wickets on three consecutive deliveries;" extended to other sports c. 1909, especially ice hockey ("In an earlier contest we had handed Army a 6-2 defeat at West Point as Billy Sloane performed hockey's spectacular 'hat trick' by scoring three goals" ["Princeton Alumni Weekly," Feb. 10, 1941]). So called allegedly because it entitled the bowler to receive a hat from his club commemorating the feat (or entitled him to pass the hat for a cash collection), but the term probably has been influenced by the image of a conjurer pulling objects from his hat (an act attested by 1876). The term was used earlier for a different sort of magic trick:
Place a glass of liquor on the table, put a hat over it, and say, "I will engage to drink every drop of that liquor, and yet I'll not touch the hat." You then get under the table; and after giving three knocks, you make a noise with your mouth, as if you were swallowing the liquor. Then, getting from under the table, say "Now, gentlemen, be pleased to look." Some one, eager to see if you have drunk the liquor, will raise the hat; when you instantly take the glass and swallow the contents, saying, "Gentlemen I have fulfilled my promise: you are all witnesses that I did not touch the hat." ["Wit and Wisdom," London, 1860]
hourglass (n.)youdaoicibaDictYouDict
1510s, from hour + glass. Used 19c. in a variety of technical and scientific senses to describe the shape; reference to women's bodies is attested by 1897.
Men condemn corsets in the abstract, and are sometimes brave enough to insist that the women of their households shall be emancipated from them; and yet their eyes have been so generally educated to the approval of the small waist, and the hourglass figure, that they often hinder women who seek a hygienic style of dress. [Mary Ashton Rice Livermore, "The Story of My Life," 1898]
schadenfreude (n.)youdaoicibaDictYouDict
"malicious joy in the misfortunes of others," 1922, German Schadenfreude, literally "damage-joy," from schaden "damage, harm, injury" (see scathe) + freude, from Old High German frewida "joy," from fro "happy," literally "hopping for joy," from Proto-Germanic *frawa- (see frolic).
What a fearful thing is it that any language should have a word expressive of the pleasure which men feel at the calamities of others; for the existence of the word bears testimony to the existence of the thing. And yet in more than one such a word is found. ... In the Greek epikhairekakia, in the German, 'Schadenfreude.' [Richard C. Trench, "On the Study of Words," 1852]
tacky (adj.2)youdaoicibaDictYouDict
"in poor taste," 1888, from earlier sense of "shabby, seedy" (1862), adjectival use of tackey (n.) "ill-fed or neglected horse" (1800), later extended to persons in like condition, "hillbilly, cracker" (1888), of uncertain origin. Related: Tackiness.
The word "tacky" is a Southern colloquialism. It was coined by a wealthier or more refined and educated class for general application to those who were not sheltered by the branches of a family tree, who were "tainted." Those who were wealthy and yet had no great-grandfathers were "tackies." The word was used both in contempt and in derision. It is now nearly obsolete in both senses. There are no aristocrats in the South now, and therefore no "tackies." No man who has the instincts of a gentleman is spoken of as a "tacky," whether he can remember the name of his grandfather's uncle or not. But it has its uses. It is employed in describing persons of low ideas and vulgar manners, whether rich or poor. It may mean an absence of style. In dress, anything that is tawdry is "tacky." A ribbon on the shopkeeper's counter, a curtain in the bolt, a shawl or bonnet, a bolt of cloth fresh from the loom may be "tacky," because it is cheap and yet pretentious. In Louisiana the inferior grade of Creole ponies are known as "tackies." [Horace Ingraham, Charleston, S.C., in "American Notes and Queries," Feb. 15, 1890]