Meaning of the word perfidious in English

What does perfidious mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

perfidious

US /pɚˈfɪd.i.əs/
UK /pəˈfɪd.i.əs/

Adjective

deceitful and untrustworthy

Example:
The general was accused of perfidious acts during the war.
Her perfidious smile hid a treacherous plan.
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