Dis‐sim′u‐la″tion (?), n. [L. dissimulatio: cf. F. dissimulation.] The act of dissembling; a hiding under a false appearance; concealment by feigning; false pretension; hypocrisy.
Let love be without dissimulation. Rom. xii. 9.
Dissimulation... when a man lets fall signs and arguments that he is not that he is. Bacon.
Simulation is a pretense of what is not, and dissimulation a concealment of what is. Tatler.