An Etymological Dictionary of the German Language/Annotated/schaudern
schaudern, verb, ‘to shudder, shiver,’ Modern High German only, from Low German schuddern; compare Dutch schudden, ‘to quake, tremble’; Middle English schudderen, English to shudder. Schütten is of a cognate stem, and, like the words of this class, is based on a Teutonic root skud, ‘to be shaken’; allied to Old High German scutisôn, ‘to shudder,’ scutisôd, ‘quaking, trembling.’ The assumption that Schauder is connected, like Schauer, with Middle High German schûr is not warranted, because the Middle High German word does not mean ‘shudder.’ See Schutt.