Etymology
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detach (v.)

1680s, "unfasten, disunite" (transitive), especially "separate for a special purpose or service," from French détacher "to detach, untie," from Old French destachier, from des- "apart" (see des-) + attachier "attach" (see attach). Related: Detached; detaching.

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detachable (adj.)

"capable of being separated," 1797; see detach + -able. Related: Detachability.

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semi-attached (adj.)

"partially or loosely united," by 1860, from semi- + past participle of detach (v.). Compare semi-detached.

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staccato (adj.)

1724, from Italian staccato, literally "detached, disconnected," past participle of staccare "to detach," shortened form of distaccare "separate, detach," from French destacher, from Old French destachier "to detach" (see detach). As an adverb from 1844. Related: Staccatissimo.

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detachment (n.)

1660s, "action of detaching or disconnecting," from French détachement (17c.), from détacher (see detach). Meaning "that which is detached," especially "portion of a military force detailed for special service or purpose" is from 1670s. Sense of "spiritual separation from the world, aloofness from objects or circumstances" is from 1798.

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attach (v.)

mid-14c. (mid-13c. in Anglo-Latin), "to take or seize (property or goods) by law," a legal term, from Old French atachier "fasten; arrest" (11c.), earlier estachier "to attach, fix; stake up, support" (Modern French attacher, also compare Italian attaccare), from a- "to" (see ad-) + a base also found in detach, perhaps from Frankish *stakon "a post, stake" or a similar Germanic word, from Proto-Germanic *stakon- "a stake," from PIE root *steg- (1) "pole, stick" (see stake (n.)).

The meaning "fasten, affix, connect," which probably is the original sense etymologically, is attested in English from c. 1400. Related: Attached; attaching.

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semi-detached (adj.)

"partly united, partly attached," originally in reference to houses joined together by a party-wall but detached from other buildings, 1845, from semi- + past participle of detach (v.).

The "Detached House" bears its peculiar characteristic on its front; it stands alone, and nothing more can be said about it; but with the "semi-detached house" there is a subtle mystery, much to be marvelled at. Semi-detached! Have the party-walls between two houses shrunk, or is there a bridge connecting the two, as in Mr. Beckford's house in Landsdown Crescent, Bath? A semi-detached house may be a house with a field on one side and a bone-boiling factory on the other. Semi-detached may mean half-tumbling to pieces. I must inquire into it. ["Houses to Let," in Household Words, March 20, 1852]
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disengage (v.)

c. 1600 in figurative sense "loosen from that which entangles;" 1660s in literal sense of "detach, release from connection," from dis- "do the opposite of" + engage (q.v.). Intransitive sense of "withdraw, become separated" is from 1640s. Related: Disengaged; disengaging.

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wrest (v.)

Old English wræstan "to twist, wrench," from Proto-Germanic *wraistjan (source of Old Norse reista "to bend, twist"), from *wreik- "to turn," from PIE root *wer- (2) "to turn, bend." Compare wrist.

The meaning "to pull, detach" (something) is recorded from c. 1300. Meaning "to take by force" (in reference to power, authority, etc.) is attested from early 15c. Related: Wrested; wresting.

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solve (v.)

late 14c., "to disperse, dissipate, loosen," from Latin solvere "to loosen, dissolve; untie, release, detach; depart; unlock; scatter; dismiss; accomplish, fulfill; explain; remove," from PIE *se-lu-, from reflexive pronoun *s(w)e- (see idiom) + root *leu- "to loosen, divide, cut apart." The meaning "explain, answer" is attested from 1530s; for sense evolution, see solution. Mathematical use is attested from 1737. Related: Solved; solving.

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