Dissimulation

Dissimulation is a form of deception in which one conceals the truth. It differs from simulation, in which one exhibits false information. Dissimulation commonly takes the form of concealing one's ability in order to gain the element of surprise over an opponent.

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• Dissimulation, even the most innocent in its nature, is ever productive of embarrassment; whether the design is evil or not, artifice is always dangerous and almost inevitably disgraceful.
  • Jean de La Bruyère