perfidiousness
perfidiousness noun: unfaithfulness; deceitfulness; perfidy.
Noun
perfidiousness (usually uncountable, plural perfidiousnesses)
- Unfaithfulness; deceitfulness; perfidy.
- Not only Cato is vanquished by Caesar, but the treachery and perfidiousness of Syphax prevail over the honest simplicity and the credulity of Juba.1781, Samuel Johnson, “Addison”, in Lives of the Poets
Synonyms of perfidiousness
- double-dealing
- treachery
- treacherousness
- betrayal
- breach of promise
- breach of trust
- Judas kiss
- perfidy
- stab in the back
- tergiversation
5 more synonymsFewer synonyms
Forms of perfidiousness
| plural | perfidiousnesses |
|---|
Origin of perfidiousness
From perfidious + -ness.
Questions about perfidiousness
- What does perfidiousness mean?
- Perfidiousness means unfaithfulness; deceitfulness; perfidy.
- What part of speech is perfidiousness?
- Perfidiousness is a noun.
- What is the plural of perfidiousness?
- The plural of perfidiousness is perfidiousnesses.
Words near perfidiousness in the dictionary
Source and license
Adapted from Wiktionary: perfidiousness (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.
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