FRITH
Source: 566, 567
frith. Frith, n. a narrow part of the fea, net, wood
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Frith (frĭth), n. [[OE. firth, Icel. fjörðr; akin to Sw. fjärd, Dan. fiord, E. ford. √78. See Ford, n., and cf. Firth, Fiord, Fret a frith, Port a harbor.]] 1. 1. (Geog.) A narrow arm of the sea; an estuary; the opening of a river into the sea; as, the Frith of Forth.
2. 2. A kind of weir for catching fish. Carew.