Meaning of “perfidious” in the English Dictionary

british dictionary

"perfidious" in British English

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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)

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