Yours, Etc.: Origins and Uses of 8 Sign-Offs
c.1200, likur "any matter in a liquid state," from Old French licor "fluid, liquid; sap; oil" (Modern French liqueur), from Latin liquorem (nominative liquor) "liquidity, fluidity," also "a liquid, the sea," from liquere "be fluid, liquid" (see liquid (adj.)). Narrowed sense of "fermented or distilled drink" (especially wine) first recorded c.1300. To liquor up "get drunk" is from 1845. The form in English has been assimilated to Latin, but the pronunciation has not changed.
liquor liq·uor (lĭk'ər)
An aqueous solution, especially of a medicinal substance.
An alcoholic beverage made by distillation rather than by fermentation.
(lī'kwôr, lĭk'wôr) In anatomical nomenclature, a term for any of several body fluids.