An Etymological Dictionary of the German Language/Annotated/krächzen

by Friedrich Kluge

krächzen, verb, ‘to croak,’ Modern High German only, a derivative of krachen; in Middle High German krochzen, Old High German chrocchezan, ‘to croak,’ which is related by gradation to the stem of krachen. From Anglo-Saxon cracian, cracettan was formed, like Modern High German krächzen, from krachen.