perfidiousness

English

Etymology

From perfidious +‎ -ness.

Noun

perfidiousness (usually uncountable, plural perfidiousnesses)

  1. (rare) Unfaithfulness; deceitfulness; perfidy.
    Synonyms: double-dealing, treachery, treacherousness; see also Thesaurus:betrayal
    • 1781, Samuel Johnson, “Addison”, in Lives of the Poets:
      Not only Cato is vanquished by Caesar, but the treachery and perfidiousness of Syphax prevail over the honest simplicity and the credulity of Juba.

References

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