Dissimulate

Dissimulate: Dissimulate should more appropriately be spelled dyssimulate, since it means to present a bad (dys-) simulation or a deception. Dissimulate is a synonym for another similar word that also means to deceive: dissemble.

Diplomacy and dissimulation, those are your best tools. Use them with skill, Elizabeth, and everything will be fine.

She had been something of an actress all her life, brilliant at dissimulation.