Etymology
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energetic (adj.)
1650s, "powerful in operation," from Greek energetikos "active," from energein "to work, be in action, act upon" (see energy). Of persons, "active," in English from 1796 (energetical "operative" is from c. 1600; from 1630s as "full of energy," while energical is attested from 1560s). Related: Energetically.
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bypass (n.)
also by-pass, 1848, "small pipe passing around a valve in a gasworks" (for a pilot light, etc.), from the verbal phrase; see by + pass (v.). First used 1922 for "road for the relief of congestion;" figurative sense is from 1928. The heart operation was first so called 1957.
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override (v.)

Middle English overriden, from Old English oferridan "to ride across, ride through or over," from ofer "over" (see over) + ridan "to ride" (see ride (v.)). Originally literal, of cavalry, etc. Figurative meaning "to set aside arrogantly" is by 1827, from the notion of "to trample down," hence "supersede." The mechanical sense "to suspend automatic operation" is attested from 1946. As a noun in the sense "act or process of suspending automatic operation," from 1946. Related: Overrode; overriding; overridden.

And þanne þeze Frenschmen come prikkyng doun as þei wolde haue ouyr-rydyn alle oure meyne; but God and our archers made hem sone to stomble. [Layamon, from the description of the Battle of Agincourt in "The Brut, or The Chronicles of England"] 
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A&P 
original U.S. grocery chain and leading food retailer of the mid-20c., the abbreviation by 1875, originally The Great Atlantic and Pacific Tea Company, which grew out of a New York firm founded 1859 by George Gilman and subsequently expanded by George Huntington Hartford. It ceased operation in 2015.
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push-button (adj.)

"characterized by the use of push-buttons," 1945, originally of military systems, earlier "operated by push-buttons" (1903), from push-button (n.) "button pressed with the finger to effect some operation," 1865, from push (v.) + button (n.). Earlier adjective was press-button (1892), from the noun (1879).

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prime (v.)

"to fill, charge, load" (a weapon, before firing), 1510s, probably from prime (adj.). General sense of "perform the first operation on, prepare (something, especially wood, etc., for painting)" is from c. 1600. To prime a pump (1769) meant to pour water down the tube, which saturated the sucking mechanism and made it draw up water more readily. Related: Primed; priming.

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reposition (n.)

early 15c. (Chauliac), reposicioun, in medicine, "a placing, putting, act of replacing, operation of restoring (something) to its original position," from Late Latin repositionem (nominative repositio) "a laying up, a storing up," noun of action from past-participle stem of Latin reponere (see repose (v.2)). Meaning "act of laying up in safety" is from 1610s; that of "reinstatement" (of a person, to an office, etc.)
is from 1640s.

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debris (n.)

"accumulation of loose matter or rubbish from some destructive operation or process," 1708, from French débris "remains, waste, rubbish" (16c.), from obsolete debriser "break down, crush," from Old French de- (see de-) + briser "to break," from Late Latin brisare, which is possibly of Gaulish origin (compare Old Irish brissim "I break").

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amputation (n.)

1610s, "a cutting off of tree branches, a pruning," also "operation of cutting off a limb, etc., of a body," from French amputation or directly from Latin amputationem (nominative amputatio), noun of action from past-participle stem of amputare "to cut off, lop off; cut around, to prune," from am(bi)- "around" (from PIE root *ambhi- "around") + putare "to prune, trim" (from PIE root *pau- (2) "to cut, strike, stamp").

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gurney (n.)
type of hospital cart, by 1921, of unknown origin. It also is a surname, and perhaps this use traces to the Gurney Ball Bearing Co. of Jamestown, N.Y., which was in active operation at the time but seems to have specialized in bearings for automobiles. Earliest use in hospital literature is in reference to carts for food and laundry.
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