An Etymological Dictionary of the German Language/Annotated/kreisen
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kreisen, kreißen, verb, ‘to be in labour,’ from Middle High German krîȥen, ‘to screech, shriek, groan’; compare Dutch krijten, ‘to shriek, shout.’ For further cognates see kreischen; akin also to Middle High German krîsten, earlier Modern High German kreisten, ‘to groan.’