MEANING
Deliberately faithless or treacherous, especially toward someone who trusted the person.
Use it for
Describe a trusted figure whose loyalty proves false.Characterize a betrayal as calculated and morally disloyal.
Words that belong together
- perfidious ally
- perfidious betrayal
- perfidious promise
On the page
The perfidious guide returned with a smile and a false map.
Nearby words
Opposite meanings
Word forms
- Base
- perfidious
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Usage notes
A strongly condemnatory, literary word for betrayal; it is more pointed than merely unreliable.
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