quirk

Origin

First attested in the 1540s. Of uncertain origin. Possibly from Middle English *querk, from Old Norse kverk (“a bend or angle, especially below a cross-beam or below the chin, the bight of an axe", also "throat, gullet”), from Proto-Germanic *kwerkō (“throat, gullet”), from Proto-Indo-European *gʷerh₃- (“to devour; maw”). Cognate with Scots querk (“throat", also "any hollow in the body, such as an armpit, groin, instep, etc.”), Icelandic kverk (“interior angle”).