An Etymological Dictionary of the German Language/entsetzen

by Friedrich Kluge

entsetzen, ‘to displace, depose’; (refl.) ‘to be shocked, terrified,’ from MidHG. entsętzen, ‘to lay aside, disconcert, be afraid,’ from MidHG. entsitzen, OHG. intsizzen, ‘to lose one's seat, fear, terrify,’ Goth. andsitan, ‘to shun, fear.’