Deceit

noun

1. An act or practice intended to deceive; a trick.

   "The whole conversation was merely a deceit."

2. An act of deceiving someone.
3. The state of being deceitful or deceptive.
4. The tort or fraudulent representation of a material fact made with knowledge of its falsity, or recklessly, or without reasonable grounds for believing its truth and with intent to induce reliance on it; the plaintiff justifiably relies on the deception, to his injury.