de·ceit·ful 
/dɪˈsi:tfəl/ adjective
/dɪˈsi:tfəl/ adjective [more deceitful; most deceitful] : not honest : making or trying to make someone believe something that is not true
▪ a scheming, deceitful [=dishonest] person ▪ a deceitful answer ▪ deceitful [=deceiving] advertisements
▪ a scheming, deceitful [=dishonest] person ▪ a deceitful answer ▪ deceitful [=deceiving] advertisements
— de·ceit·ful·ly adverb
▪ He acted deceitfully.
▪ He acted deceitfully.
— de·ceit·ful·ness noun [noncount]
▪ He was surprised by the child's deceitfulness.
▪ He was surprised by the child's deceitfulness.
