An Etymological Dictionary of the German Language/Annotated/entsetzen

by Friedrich Kluge

entsetzen, ‘to displace, depose’; (reflexive) ‘to be shocked, terrified,’ from Middle High German entsętzen, ‘to lay aside, disconcert, be afraid,’ from Middle High German entsitzen, Old High German intsizzen, ‘to lose one's seat, fear, terrify,’ Gothic andsitan, ‘to shun, fear.’