(每日一词) perfidious

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Perfidious /pərˈfɪdiəs/ adj. 不忠的; 不可信的

Meaning: Deceitful and untrustworthy, especially in betraying vows or allegiance

前缀: per- 穿过, 透过(perfect)

词根: fid-相信(confident)

后缀: -ous 形容词后缀

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