slok
nafnorðhvorugkyn
n. [Engl. sluice; Dan. slug; cp. Germ. schlucht], the sluice by which the water is led to the wheel of a water-mill, B. K. 81, D. N. iv. 536; hann var mylnu-vörðr ok hafði vaktað slok (sloa Ed.) undir mylnurnar, Post. 246 (the printed Ed.)