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Word of the Day Tuesday, June 9, 2026

perfidiously

/pərˈfɪdɪəsli/ adverb · British & US
Valid in UKValid in US
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What does perfidiously mean?

adverb

Done in a treacherously disloyal or deceitful manner; done with a treacherous or disloyal intent.

Example

"She spoke perfidiously about her former friend, revealing their deepest secrets."

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

Synonyms for perfidiously

Antonyms of perfidiously

Rhymes with perfidiously

Etymologically related