Source : Webster's Revised Unabridged Dictionary (1913)

Unbit \Un*bit"\, v. t. [imp. & p. p. {Unbitted}; p. pr. & vb. n.
   {Unbitting}.] [1st pref. un- + bit.] (Naut.)
   To remove the turns of (a rope or cable) from the bits; as,
   to unbit a cable. --Totten.