Source : Webster's Revised Unabridged Dictionary (1913)

Knavery \Knav"er*y\, n.; pl. {Knaveries}.
   1. The practices of a knave; petty villainy; fraud; trickery;
      a knavish action.

            This is flat knavery, to take upon you another man's
            name.                                 --Shak.

   2. pl. Roguish or mischievous tricks. --Shak.

Source : WordNet®

knavery
     n : lack of honesty; acts of lying or cheating or stealing [syn:
          {dishonesty}]