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claret [claret 词源字典]: claret: [14] Claret was originally a ‘lightcoloured wine’ – pale red (virtually what we would now call rosé), but also apparently yellowish. The word comes ultimately from Latin clārus ‘clear’; from this was derived the verb clārāre, whose past participle was used in the phrase vīnum clārātum ‘clarified wine’. This passed into Old French as vin claret.

Modern French clairet preserves the word’s early sense ‘pale wine, rosé’, but in English by the later 17th century seems to have been transferred to red wine, and since in those days the vast majority of red wine imported into Britain came from Southwest France, and Bordeaux in particular, it was not long before claret came to mean specifically ‘red Bordeaux’.
=> clear[claret etymology, claret origin, 英语词源]
declare: declare: [14] To declare something is to make it ‘clear’. English acquired the word from Latin dēclārāre ‘make clear’, a compound verb formed from the intensive prefix dē- and clārāre ‘make clear’, a derivative of clārus ‘clear’.
=> claret, clear
Clarence: surname, from Medieval Latin Clarencia, name of dukedom created 1362 for Lionel, third son of Edward III, so called from town of Clare, Suffolk, whose heiress Lionel married. Used as a masc. proper name from late 19c. As a type of four-wheeled closed carriage, named for the Duke of Clarence, later William IV.
clarendon (n.): a thickened Roman type face, 1845, evidently named for the Clarendon press at Oxford University, which was set up 1713 in the Clarendon Building, named for university Chancellor Edward Hyde, 1st Earl of Clarendon.
claret (n.): mid-15c., "light-colored wine," from Old French (vin) claret "clear (wine), light-colored red wine" (also "sweetened wine," a sense in English from late 14c.), from Latin clarus "clear" (see clear (adj.)). Narrowed English meaning "red wine of Bordeaux" (excluding burgundy) first attested 1700. Used in pugilistic slang for "blood" from c. 1600.
declare (v.): early 14c., from Old French declarer "explain, elucidate," or directly from Latin declarare "make clear, reveal, disclose, announce," from de- intensive prefix (see de-) + clarare "clarify," from clarus "clear" (see clear (adj.)). Related: Declared; declaring.