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

Custine was accused of harshness, of unskilfulness, perfidiousness; accused of many things: found guilty, we may say, of one thing, unsuccessfulness.

From The French Revolution by Carlyle, Thomas

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 Bunyan, John

After this they entered into some discourse of Melanthe, and whether it would be proper for Louisa to write her an account of this affair, and the count's perfidiousness.

From The Fortunate Foundlings Being the Genuine History of Colonel M——Rs, and His Sister, Madam Du P——Y, the Issue of the Hon. Ch——Es M——Rs, Son of the Late Duke of R—— L——D. Containing Many Wonderful Accidents That Befel Them in Their Travels, and Interspersed with the Characters and Adventures of Several Persons of Condition, In the Most Polite Courts of Europe. the Whole Calculated for the Entertainment and Improvement of the Youth of Both Sexes. by Haywood, Eliza Fowler

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 Beck, James M. (James Montgomery)