de ‧ ceit /dɪˈsiːt/ BrE AmE noun [uncountable and countable]
[ Word Family: noun : ↑ deceit , ↑ deceiver , ↑ deception ; adjective : ↑ deceitful , ↑ deceptive ; verb : ↑ deceive ; adverb : ↑ deceptively ]
[ Date: 1200-1300 ; Language: Old French ; Origin: Latin decipere ; ⇨ ↑ deceive ]
behaviour that is intended to make someone believe something that is not true:
an atmosphere of hypocrisy and deceit
deliberate/calculated/outright deceit