Source : Webster's Revised Unabridged Dictionary (1913)

Stith \Stith\, a. [AS. st[=i][eth].]
   Strong; stiff; rigid. [Obs. or Prov. Eng.]

Stith \Stith\, n. [Icel. ste[eth]i an anvil, akin to sta[eth]r
   place. See {Stead}.]
   An anvil; a stithy. [Obs. or Prov. Eng.]

         He invented also pincers, hammers, iron crows, and the
         anvil, or stith.                         --Holland.