Etymology
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liquor (v.)
c. 1500, "to moisten," from liquor (n.). From 1550s as "supply with liquor," 1839 as "drink" (intoxicating liquor). To liquor up "get drunk" is from 1845. Related: Liquored; liquoring.
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license (v.)

c. 1400, "grant formal authorization to do what would be illegal to do without it," from licence (n.), which see for the modern attempt at differentiation of spelling. Related: Licensed; Licensing.

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liquor (n.)
c. 1200, likur "any matter in a liquid state, a liquid or fluid substance," from Old French licor "fluid, liquid; sap; oil" (12c., Modern French liqueur), from Latin liquorem (nominative liquor) "a liquid, liquor; wine; the sea," originally "liquidity, fluidity," from liquere "be fluid, liquid" (see liquid (adj.)).

Narrowed sense of "fermented or distilled drink" (especially wine) first recorded c. 1300; the broader sense seems to have been obsolete from c. 1700. As long as liquor is in him was a Middle English expression, "as long as he is alive," that is, "as long as he has a drop of blood left." The form in Modern English has been assimilated to Latin, but the old pronunciation persists.
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pot-liquor (n.)

"liquid in which meat has been boiled," 1744, from pot (n.1) + liquor (n.).

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licensed (adj.)
1590s, "given privilege or free range," past-participle adjective from license (v.). Meaning "having been granted a license" is from 1630s.
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licensee (n.)
"one to whom a licence is granted," 1837, from license (v.) + -ee.
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licensure (n.)
"a licensing, the granting of a licence," 1808, from license (v.) + -ure.
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unlicensed (adj.)
1630s, from un- (1) "not" + past participle of license (v.).
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liqueur (n.)
"sweetened, flavored alcoholic liquor," 1729, from French liqueur "liquor, liquid," from Old French licor "liquid." See liquor, which is the same word but borrowed earlier.
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swig (n.)
1540s, "a drink, liquor," later "big or hearty drink of liquor" (1620s), of unknown origin.
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