An Etymological Dictionary of the German Language/Annotated/schrappen
schrappen, verb, ‘to scrape,’ Modern High German only, from Low German schrappen, an intensive form of Dutch schrapen, schrabben, ‘to scratch,’ Middle English scrapien (schrapien), English to scrape, Old Icelandic skrapa. From the Low German cognates Old French escraper, ‘to scratch off,’ is derived. See further under schröpfen and schrubben.