The Collaborative International Dictionary of English v.0.48:

Enslave \En*slave"\, v. t. [imp. & p. p. Enslaved; p. pr. &
   vb. n. Enslaving.]
   To reduce to slavery; to make a slave of; to subject to a
   dominant influence.
   [1913 Webster]

         The conquer'd, also, and enslaved by war,
         Shall, with their freedom lost, all virtue lose.
                                                  --Milton.
   [1913 Webster]

         Pleasure admitted in undue degree
         Enslaves the will.                       --Cowper.
   [1913 Webster]