Source : Webster's Revised Unabridged Dictionary (1913)

Unacquainted \Un`ac*quaint"ed\, a.
   1. Not acquainted. --Cowper.

   2. Not usual; unfamiliar; strange. [Obs.]

            And the unacquainted light began to fear. --Spenser.

Source : WordNet®

unacquainted
     adj : having little or no knowledge of; "unacquainted with city
           ways" [syn: {unacquainted(p)}, {unacquainted with(p)},
           {unfamiliar with(p)}]