An Etymological Dictionary of the German Language/Annotated/Steiß

by Friedrich Kluge

Steiß, masculine, ‘rump, buttocks’ (with Middle German ei instead of eu), from the equivalent Middle High German and Old High German stī̆uz (hence also the early Modern High German variant Steuß), masculine, corresponding to Dutch stuit. It is probably based on a Teutonic stī̆wot-, which is primitively allied to Latin stîva, ‘plough handle.’