köken: From Middle French, from Old French loupe (“sapphire lens, imperfect gem, mass of hot metal”), of uncertain origin, though probably from Frankish *luppa (“something pendulous”), from Proto-Germanic *lubbǭ (“that which hangs or dangles”), *lub- (“to peel, hang”), from Proto-Indo-European *lep- (“to peel, skin”). Cognate with Dutch dialectal (Meuse-Rhenish) luppe (“piece”); Middle Dutch and Middle…