dissembling

dissembling (http://definr.com/dissembling)

     adj : concealing under a false appearance with the intent to
           deceive; "dissimulative arts" [syn: dissimulating, dissimulative]
     n 1: pretending with intention to deceive [syn: pretense, pretence,
           feigning]
     2: the act of deceiving [syn: deception, deceit, dissimulation]