Definition of "deceitfulness" [de•ceit•ful•ness]

• The state or quality of being deceitful. (noun)

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• "Now duplicity does not seem to pertain to lust, but rather to deceitfulness, which is a daughter of covetousness, according to Gregory (Moral. xxxi, 45)."
• "The deceitfulness, that is, the depth of wickedness, and the abominableness, past all words, of thine own heart."
• "It is what the scripture calls the deceitfulness of sin."