coif

From Middle English coif, coife, coyf, coyfe, coyffe, from Old French coife, coiffe, from Late Latin cofia, from Proto-West Germanic kuffju, related to Old High German kupphia, kupha, kupfe (“mug, hood, cap”), from Proto-Germanic kuppijǭ (“cap, hat, bonnet, headpiece”), Proto-Germanic kuppō (“vat, mug, cup”), from pre-Germanic kubná-, from Proto-Indo-European gup- (“round object, knoll”), from Proto-Indo-European gew- (“to bend, curve, arch, vault”). Cognate with Middle High German kupfe (“cap, headgear, helmet”).

From Middle English coifen, from Old French coifier, from the noun (see above).