An Etymological Dictionary of the German Language/Annotated/schützen
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schützen, verb, ‘to protect, guard, defend, shelter,’ from Middle High German schützen, ‘to embank, dam up, protect,’ which, according to Middle High German beschüten, ‘to protect,’ implies Old High German *skutisôn. The primary meaning is evident from Middle High German schüte, schüt, feminine, ‘earth-wall’ which is identical with Schutt.