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Meaning of “perfidious” in the English Dictionary

"perfidious" in British English

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perfidiousadjective

uk   /pəˈfɪd.i.əs/ us   /pɚˈfɪd.i.əs/ literary
unable to be trusted, or showing no loyalty: She described the new criminal bill as a perfidious attack on democracy.
(Definition of perfidious from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)
Translations of “perfidious”
in Chinese (Simplified) 背信弃义的, 不忠贞的…
in Chinese (Traditional) 背信棄義的, 不忠貞的…
What is the pronunciation of perfidious?
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