Claret demonstrates one of etymology's most ironic reversals: a word meaning "clear" and "light" now designating one of the deepest, darkest categories of red wine. The word derives from Old French claret, the diminutive form of clar ("clear, bright"), from Latin clarus ("clear, bright, famous"). In medieval usage, vin claret designated a light-colored wine — something between a white wine and a deep red, roughly equivalent to what the modern wine world calls rosé.
The historical context is the wine trade between Bordeaux and England, one of the oldest and most significant commercial relationships in European history. When Eleanor of Aquitaine married Henry Plantagenet (later Henry II of England) in 1152, the vast duchy of Aquitaine — including the Bordeaux wine region — came under English control. For nearly three centuries (until 1453, when the Hundred Years' War ended English rule in Gascony), Bordeaux functioned essentially as England's wine colony. English merchants
The medieval clarets shipped to England were light, young wines, made from quick pressings that produced relatively pale reds. They were drunk within a year of production, before they could darken or develop. As Bordeaux winemaking evolved over the centuries — longer maceration, deeper extraction, barrel aging — the wines became progressively darker and more full-bodied. The word claret traveled with them, gradually shifting from "light red" to "deep purplish-red."
Latin clarus generated a productive English family. "Clarity," "clear," "clarify," "clarion," and "declare" (to make clear, to make famous) all descend from this root. The musical instrument clarinet takes its name from the clear, bright tone it produces (Italian clarinetto, diminutive of clarino, "clear").
In British slang, "claret" became a colorful term for blood, presumably because of the color similarity. "Drawing the claret" or "tapping someone's claret" meant causing a bloody nose or facial wound, particularly in boxing. This pugilistic usage, attested from the early 19th century, adds a visceral dimension to a word that began with the refined clarity of light wine.