Etymology
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coefficient (n.)

also co-efficient, c. 1600, "that which unites in action with something else to produce a given effect," from co- + efficient. Probably influenced by Modern Latin coefficiens, which was used in mathematics in 16c., introduced by French mathematician François Viète (1540-1603). As an adjective, "acting in union to the same end," from 1660s. Related: Coefficiency.

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drag (v.)

late 14c., draggen, "to draw a grapnel along the bottom of a river, lake, etc., in search of something;" late 15c., "to draw away by force, pull haul," from Old Norse draga, or a dialectal variant of Old English dragan "to draw," both from Proto-Germanic *draganan "to draw, pull," perhaps from a PIE *dhregh- "to draw, drag on the ground" (source also of Sanskrit dhrajati "pulls, slides in," Russian drogi "wagon," doroga "way;"  connection to Latin trahere "to draw" is possible but problematic).

Meaning "draw (feet, tails, etc.) along slowly" is from 1580s; intransitive sense of "move heavily or slowly, hang with its weight while moving or being moved" is by 1660s. Meaning "to take a puff" (of a cigarette, etc.) is from 1914. Related: Dragged; dragging. Drag-out "violent fight" is from c. 1859. To drag (one's) feet (1946 in the figurative sense "delay deliberately") supposedly is from logging, from a lazy way to use a two-man saw.

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drag (n.)

c. 1300, dragge, "dragnet," perhaps from a Scandinavian source (compare Old Norse dragga "a load," Swedish dragg "grapnel") or from Old English dræge "dragnet," related to dragan "to draw" (see drag (v.)).

From 1708 as "anything attached to a moving body that retards its progress." As the name of a device for retarding or stopping the rotation of wheels, 1795. Sense of "annoying, boring person or thing" is 1813, perhaps from the mechanical senses or the notion of something that must be dragged as an impediment.

Sense of "women's clothing worn by a man" is by 1870, perhaps originally theater slang, from the sensation of long skirts trailing on the floor (another guess is Yiddish trogn "to wear," from German tragen); drag queen "male transvestite or cross-dresser" is from 1941.

Drag racing (1947), is said to be from thieves' slang drag "automobile" (1935), perhaps ultimately from slang sense of "wagon, buggy" (1755), because a horse would drag it. By 1851 this was transferred to "street," as in the phrase main drag (which some propose as the source of the racing sense).

In addition to the time trials there are a number of "drag races" between two or more cars. They are run, not for record, but to satisfy the desire of most Americans to see who can get from here to there in the fastest time. [Popular Mechanics, January 1947]
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schlep (v.)

"to carry or drag," 1922 (in Joyce's "Ulysses"), from Yiddish shlepen "to drag," from Middle High German sleppen, which is related to Old High German sleifen "to drag," and slifan "to slide, slip" (cognate with Middle English slippen; see slip (v.)). Related: Schlepped; schlepping.

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foot-dragging (n.)

"deliberate slowness," 1966, from foot (n.) + present-participle adjective from drag (v.).

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schlep (n.)

"stupid person, loser," 1939, short for schlepper "person of little worth" (1934), in Yiddish, "fool, beggar, scrounger," from schlep (v.) "to carry or drag." For sense evolution, compare drag (n.) "annoying dull person."

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dredge (n.)

"instrument for bringing up or removing solid matter from under water by dragging the bottom," late 15c., in Scottish dreg-boat "boat for dredging," perhaps ultimately from root of drag (possibly via Middle Dutch dregghe "drag-net").

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draggle (v.)

"to wet or befoul a garment by allowing it to drag along damp ground or mud," 1510s, frequentative of drag (v.); also see -el (3). This led to draggle-tail "sloppy woman, woman whose skirts are wet and draggled" (1590s). Related: Draggled; draggling.

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dragnet (n.)

also drag-net, "a net to draw along the bottom of a body of water for taking fish," 1540s, from see drag (v.) + net (n.). Figurative use is from 1640s; police sense attested by 1894. Probably not directly from Old English drægnet, which became early Middle English draynet and then vanished.

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draught (n.)

c. 1200, "act of pulling or drawing; quantity of liquid that one drinks at a time," from Old English *dreaht, *dræht, related to dragan "to draw, drag" (see drag (v.)). The oldest recorded sense besides that of "pulling" is of "drinking" (perhaps "so much as is drawn down the throat at once"); compare drag (n.) in reference to an inhaling on a cigarette. It is attested from c. 1300 as "that which is drawn or written." In British English, it retains the functions that did not branch off with draft (q.v.).

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