资料来源 : Webster's Revised Unabridged Dictionary (1913)

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

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