dissimulat

v. i. To dissemble; to feign; to pretend. [ 1913 Webster ]

adj. concealing under a false appearance with the intent to deceive.
Syn. -- dissembling, dissimulative. [ WordNet 1.5 ]

n. [ L. dissimulatio: cf. F. dissimulation. ] The act of dissembling; a hiding under a false appearance; concealment by feigning; false pretension; hypocrisy. [ 1913 Webster ]

Let love be without dissimulation. Rom. xii. 9. [ 1913 Webster ]

Dissimulation . . . when a man lets fall signs and arguments that he is not that he is. Bacon. [ 1913 Webster ]

Simulation is a pretense of what is not, and dissimulation a concealment of what is. Tatler. [ 1913 Webster ]