perfidiousness

And ultimately, we can’t expect that post-truth culture will somehow collapse because of its perfidiousness.

From New York Times ● May 27, 2016

She once went so far as to say, that it was not superior discernment, which enabled her to suspect the perfidiousness of Walter.

From The Loyalists, Vol. 1-3 An Historical Novel by Jane West

The governor and people continued their wonted perfidiousness; the former being more careful in taking, and the latter in giving bribes, than in paying our debts.

From A General History and Collection of Voyages and Travels — Volume 09 Arranged in Systematic Order: Forming a Complete History of the Origin and Progress of Navigation, Discovery, and Commerce, by Sea and Land, from the Earliest Ages to the Present Time by Robert Kerr

A more striking example of perfidiousness was effectually to stir Voltaire's resentment a little later.

From The Anglo-French Entente in the Seventeenth Century by Charles Bastide

And all these did Mr. Badman do, even to the utmost, if either opportunity, or purse, or perfidiousness, would help him to the obtaining of his purpose.

From Works of John Bunyan — Volume 03 by John Bunyan