An Etymological Dictionary of the German Language/Annotated/Argwohn

by Friedrich Kluge

Argwohn, masculine, from the equivalent Middle High German arcwân, masculine (compare Wahn), ‘suspicion, mistrust’; compare Modern High German Arglist, feminine, from Middle High German arclist, feminine, ‘cunning, malice,’ from arg; even in Old High German arcwânen, ‘to suspect,’ occurs, Middle High German arcwœnen.