Usually means: Deceitfulness marked by broken faith.
Definitions Related words Mentions History
We found 16 dictionaries that define the word perfidiousness:

General (14 matching dictionaries)
  1. perfidiousness: Merriam-Webster
  2. perfidiousness: Collins English Dictionary
  3. perfidiousness: Vocabulary.com
  4. perfidiousness: Wordnik
  5. perfidiousness: Wiktionary
  6. Perfidiousness, perfidiousness: Dictionary.com
  7. Perfidiousness: Online Plain Text English Dictionary
  8. perfidiousness: Webster's Revised Unabridged, 1913 Edition
  9. perfidiousness: Rhymezone
  10. Perfidiousness: AllWords.com Multi-Lingual Dictionary
  11. perfidiousness: Webster's 1828 Dictionary
  12. perfidiousness: FreeDictionary.org
  13. perfidiousness: Mnemonic Dictionary
  14. Perfidiousness: TheFreeDictionary.com

Business (1 matching dictionary)
  1. perfidiousness: Legal dictionary

Computing (1 matching dictionary)
  1. perfidiousness: Encyclopedia

(Note: See perfidious as well.)

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Definitions from Wiktionary (perfidiousness)

▸ noun:  (rare) Unfaithfulness; deceitfulness; perfidy.

Similar:
perfidy, treachery, deceptivity, cheating, infidelity, disloyalty, faithbreach, deceit, inverity, trahison, more...

Opposite:
faithfulness, loyalty, trustworthiness

Adjectives:
own, such, french, general, ridiculous, barefaced, signal, vast, more, only, relapsed

▸ Words similar to perfidiousness

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▸ Popular adjectives describing perfidiousness

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▸ Rhymes of perfidiousness

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Similar:
perfidy, treachery, deceptivity, cheating, infidelity, disloyalty, faithbreach, deceit, inverity, trahison, more...

Opposite:
faithfulness, loyalty, trustworthiness

Adjectives:
own, such, french, general, ridiculous, barefaced, signal, vast, more, only, relapsed



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