An Etymological Dictionary of the German Language/Gurt
Gurt, m., ‘girth, girdle,’ from the equiv. MidHG. gurt (in compounds über-, umbe-, under-gurt); allied to gürten from the equiv. MidHG. gürten (gurten), OHG. gurten (gurtjan); comp. OSax. gurdian, Du. gorden, AS. gyrdan, E. to gird; in Goth. gairdan, str. vb. ‘to gird.’ With the root gerd contained in these words are connected OIc. garðr, ‘fence round the farm,’ OSlov. gradŭ, ‘wall, town’ (see Garten, and respecting the evolution of meaning see Zaun). —