unacquaintance

from The Collaborative International Dictionary of English v.0.48

Unacquaintance \Un`ac*quaint"ance\, n.
   The quality or state of being unacquainted; want of
   acquaintance; ignorance.
   [1913 Webster]

         He was then in happy unacquaintance with everything
         connected with that obnoxious cavity.    --Sir W.
                                                  Hamilton.
   [1913 Webster]