Source : Webster's Revised Unabridged Dictionary (1913)

Acknow \Ac*know"\, v. t. [Pref. a- + know; AS. oncn[=a]wan.]
   1. To recognize. [Obs.] ``You will not be acknown, sir.''
      --B. Jonson.

   2. To acknowledge; to confess. [Obs.] --Chaucer.

   {To be acknown} (often with of or on), to acknowledge; to
      confess. [Obs.]

            We say of a stubborn body that standeth still in the
            denying of his fault, This man will not acknowledge
            his fault, or, He will not be acknown of his fault.
                                                  --Sir T. More.