An Etymological Dictionary of the German Language/Annotated/Schorf
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Schorf, masculine, ‘scurf, scab,’ from the equivalent Middle High German schorf, Old High German scorf, masculine; corresponding to Middle Dutch scorf, Modern Dutch schurft, Anglo-Saxon sčęorf, scurf, English scurf, Icelandic skurfur, ‘scurf, scab.’ Compare schürfen.