GRE vocabulary
perfidious
deliberately treacherous or disloyal
Test your vocabulary in a real test Full-length · no signup · instant score
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
Antonyms
loyalfaithfultrustworthy
Keep going
See all More GRE words starting with P
pacify
to calm or soothe someone who is angry or agitated
paean
a song or expression of joyful praise or triumph
painstaking
done with careful and thorough effort
palatable
agreeable to the taste or acceptable to the mind
palatial
resembling a palace in size or grandeur
palingenesis
rebirth, regeneration, or renewal into a new existence
palliate
to ease the severity of something without curing it
pallid
pale or lacking vitality and color
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.
See these words the way the GRE tests them.
Definitions in isolation do not stick. Sit a free, full-length GRE mock and meet this vocabulary inside real text completion and sentence equivalence questions, with your score and a worked solution for every answer.