From deceitful +‎ -ness.



deceitfulness (usually uncountable, plural deceitfulnesses)

  1. The state or quality of being deceitful.
    • 1526, William Tyndale, trans. Bible, Acts XIII:
      O full off all sutelte and disseytfulnes the chylde off the devyll, and the enemye of all righteousnes thou ceasest not to pervert the strayght wayes off the lorde.
    • 1839, Charles Dickens, Nicholas Nickleby, ch. 42,
      'This is the hend, is it, of all my bearing with her deceitfulness, her lowness, her falseness, her laying herself out to catch the admiration of vulgar minds . . .'
    • 1903, Andy Adams, The Log of a Cowboy: A Narrative of the Old Trail Days, ch. 20 "A Moonlight Drive",
      The lanterns both rear and forward being always in sight, I was as much at sea as any one as to the length of the herd, knowing the deceitfulness of distance of campfires and other lights by night.