Frith /(frĭth)/

Frith

n.
  1. A narrow arm of the sea; an estuary; the opening of a river into the sea; as, the Frith of Forth. Also called firth. (Geog.)
  2. A kind of weir for catching fish. [Eng.]

Frith

n.
  1. A forest; a woody place. [Obs.]
  2. A small field taken out of a common, by inclosing it; an inclosure. [Obs.]