perfidious
per
fi
ˈfɪ
fi
dious
diəs
diēs
fastidiousinsidiousinvidioushideous

Definition & Meaning of "perfidious"in English

perfidious
01

relating to someone or something that is untrustworthy and disloyal 

Grammatical Information
Composition
Simple
qualitative
Superlative
most perfidious
Comparative
more perfidious
gradable
Examples
The perfidious diplomat pretended friendship while secretly plotting against the alliance. 
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