An Etymological Dictionary of the German Language/Annotated/schröpfen
schröpfen, verb, ‘to crop young wheat, tap (trees), cup,’ from the equivalent Middle High German schrępfen, schręffen; compare Anglo-Saxon scrëpan, ‘to scratch’; also Low German schrappen, properly an intensive form. The primary meaning of the Teutonic root skrëp is ‘to scratch, cut into’ (to this scharf is allied?). Italian scaraffare, ‘to snatch away,’ is borrowed from High German.