deceit

 
Pronunciation: /dɪˈsiːt/

noun

[mass noun]
  • the action or practice of deceiving someone by concealing or misrepresenting the truth: a web of deceit hypocrisy and deceit were anathema to her [count noun]: a series of lies and deceits

Origin:

Middle English: from Old French, past participle (used as a noun) of deceveir 'deceive'