(n.) The act of dissembling; a hiding under a false appearance; concealment by feigning; false pretension; hypocrisy.

Tartuffe cloaking concealing cunning deceit deception dissemblance dissembler dissembling dissimulator double-dealing duplicity feigning guile hiding hypocrisy lip server masking misrepresentation pharisaism pharisee pretense sanctimony secreting sham whited sepulcher