applaudyoudaoicibaDictYouDict[applaud 词源字典]
applaud: [15] English probably acquired this word directly from Latin applaudere, which meant literally ‘clap at’. It was a compound formed from the prefix ad- ‘to’ and the verb plaudere ‘clap’, source also of plaudit [17] and of explode, whose original sense seems to have been ‘drive from the stage by clapping’ (or, presumably, by any other signals of disapproval favoured by Roman audiences).
=> explode, plaudit[applaud etymology, applaud origin, 英语词源]
exaggerateyoudaoicibaDictYouDict
exaggerate: [16] Something that is exaggerated is literally ‘piled up’ out of all due proportion; indeed that is what it originally meant in English: ‘With their flipping and flapping up and down in the dirt they exaggerate a mountain of mire’, Philip Stubbes, Anatomy of Abuses 1583. It was not really until the 17th century that the current sense ‘overemphasize’ came to the fore, although it was already present in the word’s Latin original. This was exaggerāre, a compound formed from the intensive prefix exand aggerāre ‘pile up’ (a derivative of agger ‘heap’).
gauntletyoudaoicibaDictYouDict
gauntlet: The gauntlet of ‘run the gauntlet’ has no etymological connection with gauntlet ‘glove’ [15]. The latter was borrowed from Old French gantelet, a diminutive form of gant ‘glove’. This was originally a Germanic loanword, with surviving relatives in Swedish and Danish vante ‘glove’. As for ‘running the gauntlet’, it was to begin with ‘running the gantlope’, in which gantlope signified ‘two lines of people armed with sticks, who attacked someone forced to run between them’.

This was borrowed in the 17th century from Swedish gatlopp, a descendant of Old Swedish gatulop ‘passageway’; this was a compound noun formed from gata ‘way’ (related to English gate, gait) and lop ‘course’ (related to English leap and lope). Under the influence of gauntlet ‘glove’, English changed gatlopp to gantlope, and thence to gantlet (now restricted in use to an ‘overlapping section of railway track’) and gauntlet (as in ‘run the gauntlet’).

=> gait, gate, leap, lope
allay (v.)youdaoicibaDictYouDict
Old English alecgan "to put down, remit, give up," a Germanic compound (cognates: Gothic uslagjan, Old High German irleccan, German erlegen), from a- "down, aside" + lecgan "to lay" (see lay).

Early Middle English pronunciations of -y- and -g- were not always distinct, and the word was confused in Middle English with various senses of Romanic-derived alloy and allege, especially the latter in an obsolete sense of "to lighten," from Latin ad- "to" + levis (see lever).
Amid the overlapping of meanings that thus arose, there was developed a perplexing network of uses of allay and allege, that belong entirely to no one of the original vbs., but combine the senses of two or more of them. [OED]
The double -l- is 17c., a mistaken Latinism. Related: Allayed; allaying.
applaud (v.)youdaoicibaDictYouDict
late 15c. (implied in applauding), "to express agreement or approval; to praise," from Latin applaudere "to clap the hands in approbation, to approve by clapping hands; to strike upon, beat," from ad "to" (see ad-) + plaudere "to clap" (see plaudit). Sense of "express approval of" is from 1590s; that of "to clap the hands" is from 1590s. Figurative sense arrived in English before literal. Related: Applauded; applauding.
applause (n.)youdaoicibaDictYouDict
early 15c., from Latin applausus, past participle of applaudere "approve by clapping hands" (see applaud).
clap (v.)youdaoicibaDictYouDict
Old English clæppan "to throb, beat," common Germanic, echoic (cognate with Old Frisian klapa "to beat," Old Norse klappa, Old High German klaphon, German klappen, Old Saxon klapunga). Meaning "to strike or knock" is from c. 1300. Meaning "to make a sharp noise" is late 14c. Of hands, to beat them together to get attention or express joy, from late 14c. To clap (someone) on the back is from 1520s. Related: Clapped; clapping.
clap (n.1)youdaoicibaDictYouDict
"loud noise," c. 1200, from clap (v.). Of thunder, late 14c. Meaning "sudden blow" is from c. 1400; meaning "noise made by slapping the palms of the hands together" is from 1590s.
crumby (adj.)youdaoicibaDictYouDict
1731, "full of crumbs," from crumb + -y (2). Overlapping somewhat with crummy, but generally restricted to the more literal senses.
explode (v.)youdaoicibaDictYouDict
1530s (transitive), "to reject with scorn," from Latin explodere "drive out or off by clapping, hiss off, hoot off," originally theatrical, "to drive an actor off the stage by making noise," hence "drive out, reject, destroy the repute of" (a sense surviving in an exploded theory), from ex- "out" (see ex-) + plaudere "to clap the hands, applaud," which is of uncertain origin. Athenian audiences were highly demonstrative. clapping and shouting approval, stamping, hissing, and hooting for disapproval. The Romans seem to have done likewise.
At the close of the performance of a comedy in the Roman theatre one of the actors dismissed the audience, with a request for their approbation, the expression being usually plaudite, vos plaudite, or vos valete et plaudite. [William Smith, "A First Latin Reading Book," 1890]
English used it to mean "drive out with violence and sudden noise" (1650s), later "cause to burst suddenly and noisily" (1794). Intransitive sense of "go off with a loud noise" is from 1790, American English; figurative sense of "to burst with destructive force" is by 1882; that of "burst into sudden activity" is from 1817; of population by 1959. Related: Exploded; exploding.
explosion (n.)youdaoicibaDictYouDict
1620s, "action of driving out with violence and noise," from French explosion, from Latin explosionem (nominative explosio) "a driving off by clapping," noun of action from past participle stem of explodere "drive out by clapping" (see explode for origin and sense evolution). Meaning "a going off with violence and noise" is from 1660s. Sense of "a rapid increase or development" is first attested 1953.
flag (n.1)youdaoicibaDictYouDict
"cloth ensign," late 15c., now in all modern Germanic languages (German Flagge, Dutch vlag, Danish flag, Swedish flagg, etc.) but apparently first recorded in English, of unknown origin, but likely connected to flag (v.1) or else an independent imitative formation "expressing the notion of something flapping in the wind" [OED]. A guess considered less likely is that it is from flag (n.2) on the notion of being square and flat.

Meaning "name and editorial information on a newspaper" is by 1956. U.S. Flag Day (1894) is in reference to the adopting of the Stars and Stripes by the Continental Congress on June 14, 1777.
flag (v.1)youdaoicibaDictYouDict
1540s, "flap about loosely," probably a later variant of Middle English flakken, flacken "to flap, flutter" (late 14c.), which probably is from Old Norse flaka "to flicker, flutter, hang losse," perhaps imitative of something flapping lazily in the wind. Sense of "go limp, droop, become languid" is first recorded 1610s. Related: Flagged; flagging.
flap (n.)youdaoicibaDictYouDict
mid-14c., flappe "a blow, slap, buffet," probably imitative of the sound of striking. Sense of "device for slapping or striking" is from early 15c. Meaning "something that hangs down" is first recorded 1520s, probably from flap (v.). Sense of "motion or noise like a bird's wing" is 1774; meaning "disturbance, noisy tumult" is 1916, British slang.
flap (v.)youdaoicibaDictYouDict
early 14c., "dash about, shake, beat (the wings);" later "strike, hit" (mid-14c.); probably ultimately imitative. Meaning "to swing about loosely" is from 1520s. Related: Flapped; flapping.
flapper (n.)youdaoicibaDictYouDict
1560s, "one who or that which flaps," agent noun from flap (v.). Sense of "forward young woman" is 1921 slang, but the exact connection is disputed. Perhaps from flapper "young wild-duck or partridge" (1747), with reference to flapping wings while learning to fly, many late 19c. examples of which are listed in Wright's "English Dialect Dictionary" (1900), including one that defines it as "A young partridge unable to fly. Applied in joke to a girl of the bread-and-butter age."

Other suggested sources include a late 19c. northern English dialectal use of the word for "teen-age girl" (on notion of one with the hair not yet put up), or an earlier meaning "prostitute" (1889), which is perhaps from dialectal flap "young woman of loose character" (1610s). Any or all of these might have converged in the 1920s sense. Wright also has flappy, of persons, "wild, unsteady, flighty," with the note that it also was "Applied to a person's character, as 'a flappy lass,'" and further on he lists flappy sket (n.) "an immoral woman." In Britain the word took on political tones in reference to the debate over voting rights.
"Flapper" is the popular press catch-word for an adult woman worker, aged twenty-one to thirty, when it is a question of giving her the vote under the same conditions as men of the same age. ["Punch," Nov. 30, 1927]
flip-flop (n.)youdaoicibaDictYouDict
also flip flop, "plastic thong beach sandal," by 1970, imitative of the sound of walking in them. Flip-flap had been used in various senses, mostly echoic or imitative of a kind of loose flapping movement, since 1520s:
Flip-flaps, a peculiar rollicking dance indulged in by costermongers, better described as the double shuffle; originally a kind of somersault. [Hotten's Slang Dictionary, 1864]
Flip-flop in the general sense of "complete reversal of direction" dates from 1900; it began to be used in electronics in the 1930s in reference to switching circuits that alternate between two states. As a verb by 1897. Flop (n.) in the sense "a turn-round, especially in politics" is from 1880.
flirt (n.)youdaoicibaDictYouDict
1540s, "joke, jest, stroke of wit, contemptuous remark," from flirt (v.). By 1560s as "a pert young hussey" [Johnson], and Shakespeare has flirt-gill (i.e. Jill) "a woman of light or loose behavior" (Fletcher formalizes it as flirt-gillian), while flirtgig was a 17c. Yorkshire dialect word for "a giddy, flighty girl." One of the many fl- words suggesting loose, flapping motion and connecting the notions of flightiness and licentiousness. Compare English dialect and Scottish flisk "to fly about nimbly, skip, caper" (1590s); source of Scott's fliskmahoy "girl giddy and full of herself." The meaning "person who plays at courtship" is from 1732 (as the name of female characters in plays at least since 1689 (Aphra Behn's "The Widow Ranter")). Also in early use sometimes "person one flirts with," though by 1862 this was being called a flirtee.
fly (n.)youdaoicibaDictYouDict
Old English fleoge "a fly, winged insect," from Proto-Germanic *fleugon "flying insect" (cognates: Old Saxon fleiga, Old Norse fluga, Middle Dutch vlieghe, Dutch vlieg, Old High German flioga, German Fliege "fly"); literally "the flying (insect)" (compare Old English fleogende "flying"), from same source as fly (v.1).

Originally any winged insect (moths, gnats, beetles, locusts, hence butterfly, etc.) and long used by farmers and gardeners for any insect parasite. Flies figuratively for "large numbers" of anything is from 1590s. Plural flien (as in oxen, etc.) gradually normalized 13c.-15c. to -s. Fly in the ointment is from Eccles. x:1. Fly on the wall "unseen observer" first recorded 1881. No flies on _____ "no lack of activity or alertness on the part of," is attested by 1866. Meaning "fish-hook dressed to resemble an insect" is from 1580s; Fly-fishing is from 1650s. Fly-catcher "bird which eats insects on the wing" is from 1670s. The fly agaric mushroom (1788) so called because it was used as a poison for flies.

The sense of "a flight, flying" is from mid-15c. From the verb and the notion of "flapping as a wing does" comes the noun sense of "tent flap" (1810), which was extended to "strip of material sewn into a garment as a covering for buttons" or some other purpose (1844). Baseball fly ball attested by 1866. To do something on the fly is 1856, apparently from baseball.
When the catcher sees several fielders running to catch a ball, he should name the one he thinks surest to take it, when the others should not strive to catch the ball on the fly, but only, in case of its being missed, take it on the bound. ["The American Boys Book of Sports and Games," New York, 1864]
lap (v.1)youdaoicibaDictYouDict
"take up liquid with the tongue," from Old English lapian "to lap up, drink," from Proto-Germanic *lapojan (cognates: Old High German laffen "to lick," Old Saxon lepil, Dutch lepel, German Löffel "spoon"), from PIE imitative base *lab- (cognates: Greek laptein "to sip, lick," Latin lambere "to lick"), indicative of licking, lapping, smacking lips. Meaning "splash gently" first recorded 1823, based on similarity of sound. Related: Lapped; lapping.
lap (v.2)youdaoicibaDictYouDict
"to lay one part over another," early 14c., "to surround (something with something else)," from lap (n.). Figurative use, "to envelop (in love, sin, desire, etc.)" is from mid-14c. The sense of "to get a lap ahead (of someone) on a track" is from 1847, on notion of "overlapping." The noun in this sense is 1670s, originally "something coiled or wrapped up;" meaning "a turn around a track" (1861) also is from this sense. Related: Lapped; lapping; laps.
lapwing (n.)youdaoicibaDictYouDict
Middle English lappewinke (late 14c.), lapwyngis (early 15c.), folk etymology alteration of Old English hleapewince, probably literally "leaper-winker," from hleapan "to leap" + wince "totter, waver, move rapidly," related to wincian "to wink." Said to be so called from "the manner of its flight" [OED] "in reference to its irregular flapping manner of flight" [Barnhart], but the lapwing also flaps on the ground pretending to have a broken wing to lure egg-hunters away from its nest, which seems a more logical explanation. Its Greek name was polyplagktos "luring on deceitfully."
licking (n.)youdaoicibaDictYouDict
"an act of licking or lapping," late 14c., from present participle of lick (v.1); meaning "a beating" is 1756, from lick (v.2).
louver (n.)youdaoicibaDictYouDict
also louvre, early 14c., "domed turret-like structure atop a building to disperse smoke and admit light," from Old French lovier, of uncertain origin. One theory connects it to Medieval Latin *lodarium, which might be from a Germanic source (compare Old High German louba "upper room, roof;" see lobby). Another suggests it is from French l'ouvert, literally "the open place," from le, definite article, + past participle of ouvrir "to open." Meaning "overlapping strips in a window (to let in air but keep out rain)" first recorded 1550s. The form has been influenced by apparently unrelated French Louvre, the name of the palace in Paris, which is said to be so named because its builder, Philip Augustus, intended it as a wolf kennel. Related: Louvered.
ornithopter (n.)youdaoicibaDictYouDict
1908, from French ornithoptère (1908), a machine designed to fly be mechanical flapping of wings, from ornitho- + Greek pteron "wing" (see pterodactyl). A mode of flight considered promising at least since Leonardo's day.
overbite (n.)youdaoicibaDictYouDict
"overlapping of the lower teeth by the upper ones," 1887, from over- + bite (n.).
overlap (v.)youdaoicibaDictYouDict
"to partially extend over," 1726, over- + lap (v.). Related: Overlapped; overlapping.
rabbet (n.)youdaoicibaDictYouDict
"rectangular groove cut out of the edge of a piece of wood or stone so that it may join by lapping with others," late 14c., from Old French rabat "a recess in a wall, a lower section," literally "a beating down," a back-formation from rabattre "to beat down, beat back" (see rebate (v.)). The verb is attested from mid-15c. (implied in rabetynge).
shingle (n.1)youdaoicibaDictYouDict
"thin piece of wood," c. 1200, scincle, from Late Latin scindula (also the source of German Schindel), altered (by influence of Greek schidax "lath" or schindalmos "splinter") from Latin scandula "roof tile," from scindere "to cleave, split," from PIE root *sked- "to split." Meaning "small signboard" is first attested 1842. Sense of "woman's short haircut" is from 1924; the verb meaning "to cut the hair so as to give the impression of overlapping shingles" is from 1857.
slap (v.)youdaoicibaDictYouDict
late 15c., "strike with the open hand," from slap (n.). As an adverb, 1670s, "suddenly;" 1829, "directly." Related: Slapped; slapping.
smite (v.)youdaoicibaDictYouDict
"to hit, strike, beat," mid-12c., from Old English smitan, which however is attested only as "to daub, smear on; soil, pollute, blemish, defile" (strong verb, past tense smat, past participle smiten), from Proto-Germanic *smitan (cognates: Swedish smita, Danish smide "to smear, fling," Old Frisian smita, Middle Low German and Middle Dutch smiten "to cast, fling," Dutch smijten "to throw," Old High German smizan "to rub, strike," German schmeißen "to cast, fling," Gothic bismeitan "to spread, smear"). "The development of the various senses is not quite clear, but that of throwing is perh. the original one" [OED]. Watkins suggests "the semantic channel may have been slapping mud on walls in wattle and daub construction" and connects it with PIE *sme- "to smear;" Klein's sources also say this.

Sense of "slay in combat" (c. 1300) is from Biblical expression smite to death, first attested c. 1200. Meaning "visit disastrously" is mid-12c., also Biblical. Meaning "strike with passion or emotion" is from c. 1300.
splint (n.)youdaoicibaDictYouDict
c. 1300, "overlapping plate or strip in armor" (made of metal splints), probably from Middle Low German splinte, splente "thin piece of iron," related to Middle Dutch splinte "splint," probably literally "thin piece cut off," and from a Germanic offshoot of PIE *(s)plei- "to split, splice" (see flint). Cognate with Danish splint "splinter," Swedish splint "wooden peg, wedge." Meaning "slender, flexible slip of wood" is recorded from early 14c.; specific surgical sense is attested from c. 1400.
swap (v.)youdaoicibaDictYouDict
c. 1200, "to strike, strike the hands together," of uncertain origin, possibly imitative of the sound of hitting or slapping. The sense of "to exchange, barter, trade" is first recorded 1590s, possibly from the notion of slapping hands together as a sign of agreement in bargaining (as in strike a bargain). Related: Swapped; swapping. The noun in this sense is attested from 1620s; earlier "a striking, an act of striking" (mid-13c.). Swap-meet attested from 1968, American English.
adjunctionyoudaoicibaDictYouDict
"The joining of two sets which without overlapping jointly constitute a larger set, or the relation between two such sets", Late 16th century: from Latin adjunctio(n)-, from the verb adjungere (see adjoin).
allopatricyoudaoicibaDictYouDict
"(Of animals or plants, especially of related species or populations) occurring in separate non-overlapping geographical areas", 1940s: from allo- 'other' + Greek patra 'fatherland' + -ic.