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Word of the Day Tuesday, June 9, 2026

perfidiousness

/pərˈfaɪdiəsnəs/ noun · British & US
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What does perfidiousness mean?

noun

The quality of being disloyal or treacherous, often in a subtle or deceitful manner. A feeling or attitude of distrust or suspicion.

Example

"The perfidiousness of the politician's actions was evident in the way he betrayed his constituents."

Definition generated by AI and curated by RJS Tech Solutions LLP.

Synonyms for perfidiousness

Antonyms of perfidiousness

Rhymes with perfidiousness

Etymologically related