An Etymological Dictionary of the German Language/Schlucht
Appearance
Schlucht, f., ‘ravine, gorge,’ ModHG. only, formed from LG., for earlier ModHG. and HG. Schluft; for LG. cht, representing HG. ft, see sacht, beschwichtigen, and Nichte. MidHG. (rare) sluft, ‘ravine,’ belongs to the Teut. root slū̆p, ‘to' slip,’ discussed under Schleife.