deceit

Short definition from Wiktionary

Noun

1. 1
   An act or practice intended to deceive; a trick.
2. 2
   An act of deceiving someone.
3. 3
   The state of being deceitful or deceptive.
4. 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.