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GRE vocabulary

perfidious

adjectiveCommon GRE wordMore P words

deliberately treacherous or disloyal

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In a sentence

Perfidious in a sentence

Here is an example sentence showing perfidious in a sentence.

His perfidious betrayal of his allies cost them the campaign.

Synonyms
treacherousfaithlessduplicitoustraitorous
Antonyms
loyalfaithfultrustworthy

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Verbal · Sentence Equivalence

The treaty was hailed as a triumph of diplomacy, yet historians now regard its terms as blank, since they merely postponed the conflicts they claimed to resolve.

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Common questions

Questions about “perfidious”

Perfidious (adjective) means deliberately treacherous or disloyal
Here is perfidious used in an example sentence: "His perfidious betrayal of his allies cost them the campaign."
Common synonyms for perfidious include treacherous, faithless, duplicitous, traitorous.
Antonyms of perfidious include loyal, faithful, trustworthy.
Perfidious is a GRE-level vocabulary word worth knowing for the Verbal section.

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