unfree

from WordNet (r) 3.0 (2006)

unfree
    adj 1: held in servitude; "he was born of slave parents" [ant:
           {free}]
    2: hampered and not free; not able to act at will [ant: {free}]

from The Collaborative International Dictionary of English v.0.48

Unfree \Un*free"\, a.
   Not free; held in bondage.
   [1913 Webster]

         There had always been a slave class, a class of the
         unfree, among the English as among all German peoples.
                                                  --J. R. Green
   [1913 Webster]