Etymology
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set-up (n.)

1890, "arrangement," from the verbal phrase set up, which is attested from c. 1200 as "place in an erect position, place upright, make ready for use;" from set (v.) + up (adv.). From 19c. also "a favorable arrangement of the balls in billiards, etc., especially when left by one player for the next."

The verbal phrase is from 1520s as "begin business or enterprise." It also can or once could mean "to establish, found" (early 15c.), "make (a hawk) perch upright" (late 15c.), and "put (drinks, etc.) before customers or other patrons as a treat" (1880).

It is attested from 1950 (originally in pugilism) as "to bring (someone) to a vulnerable position, put (someone) in a position to be knocked down." It is attested by 1965 as "to contrive, plot." To set (someone) up "provide (someone) with means" is from 1520s. The adjective set-up "established" is attested by c. 1600.

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shake-up (n.)

also shakeup, 1847, "a shaking or stirring up;" 1899, "reorganization;" from the verbal phrase; see shake (v.) + up (adv.). Also in colloquial use, "a commotion, disturbance" (1880s). The verbal phrase shake up is attested from 1753 as "to shake together for the purposes of combining;" by 1833 as "to loosen and restore (a pillow, etc.) to proper condition by shaking;" and by 1884 as "upset the nerves, agitate" on the notion of "jar thoroughly in such a way as to damage or impair."

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wake-up (n.)

something that brings one to alertness or out of sleep, 1965, often in the 1960s in reference to a shot of heroin in the morning. Phrase wake-up call is attested from 1968, originally a call one received from the hotel desk in the morning. Verbal phrase wake up is from 1530s; earlier the adverb was out (late 14c.)

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hard-up (adj.)

"in difficulties," especially "short of money," 1821, slang; it was earlier a nautical expression, in reference to steering.

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dress-up (n.)

"act of dressing up in one's best clothes," 1865, from the verbal phrase (17c.); see dress (v.) + up (adv.).

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up-to-date (adv.)

1840, "right to the present time," from phrase up to date, probably originally from bookkeeping. As an adjective from 1865. Meaning "having the latest facts" is recorded from 1889; that of "having current styles and tastes" is from 1891.

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up-river (prep.)

1773, from up + river. As an adverb from 1848.

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back up (v.)

1767, "stand behind and support," from back (v.) + up (adv.). The meaning "move or force backward" is by 1834. Of water prevented from flowing, by 1837.

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build-up (n.)

also buildup, 1927, "accumulation of positive publicity." Of any accumulation (but especially military) from 1943. The verbal phrase is attested from late 14c.; see build (v.) + up (adv.).

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mock-up (n.)

also mockup, "model, simulation" 1919, perhaps World War I, from the verbal phrase mock up "make an experimental model" (1911), from mock (v.) + up (adv.).

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