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

What, gracious God, is man that there should be such inconsistency, and perfidiousness in his conduct!

From The Constitution of the United States A Brief Study of the Genesis, Formulation and Political Philosophy of the Constitution by James M. (James Montgomery) Beck

Now, as soon as the inhabitants of that city understood the perfidiousness of the people of Tiberias, they were greatly provoked at them.

From The Life of Flavius Josephus by William Whiston

He boasted, however, that he had effected what he could "to aid the brave men who, in Monterey, have determined to die rather than succumb to the invasion and perfidiousness of the Americans."

From Mexico, Aztec, Spanish and Republican Vol. 1 of 2 A Historical, Geographical, Political, Statistical and Social Account of That Country From the Period of the Invasion by the Spaniards to the Present Time; With a View of the Ancient Aztec Empire and Civilization; A Historical Sketch of the Late War; And Notices of New Mexico and California by Brantz Mayer

This piece of intelligence, which had been just received, put me in a violent passion: I accused the Emperor of perfidiousness.

From Memoirs of the Private Life, Return, and Reign of Napoleon in 1815, Vol. I by Pierre Alexandre Édouard, baron Fleury de Chaboulon