claretyoudaoicibaDictYouDict[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]
claret (n.)youdaoicibaDictYouDict
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.