perfidious
Pronunciation
Adjective
C1 Advanced
Quick answer
Deceitful and untrustworthy; disloyal.
Synonyms and antonyms
Synonyms
treacherous
disloyal
Antonyms
loyal
faithful
Test yourself
Which word fits the gap? "The novel's _____ advisor secretly worked for the enemy."
Answer: perfidious
In your own words, what does "perfidious" mean?
Deceitful and untrustworthy; disloyal.
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