perfidiousadjective
uk/pəˈfɪd.i.əs/us/pɚˈfɪd.i.əs/literaryunable to be trusted, or showing no loyalty:
She described the new criminal bill as a perfidious attack on democracy.
Thesaurus: synonyms and related words
Disloyalty, betrayal & treason
- adultery
- backstabber
- betray
- betrayal
- break ranks idiom
- collaborate
- deserter
- desertion
- double-cross
- faithless
- false
- fifth column
- high treason
- sellout
- stab
- stab sb in the back idiom
- traitor
- treacherous
- treachery
- treason
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