Source : Webster's Revised Unabridged Dictionary (1913)

Unyoke \Un*yoke"\, v. t. [1st pref. un- + yoke.]
   1. To loose or free from a yoke. ``Like youthful steers
      unyoked, they take their courses.'' --Shak.

   2. To part; to disjoin; to disconnect. --Shak.

Source : WordNet®

unyoke
     v : remove the yoke from; "unyoke the cow" [ant: {yoke}]