An Etymological Dictionary of the German Language/Zingel
Zingel, m., ‘stone wall, palisade,’ from MidHG. zingel, m., ‘rampart,’ whence ModHG. umzingeln, ‘to encircle, surround’ (MidHG. zingeln, ‘to make an entrenchment’), formed like Lat. cingulus, cingere.