Eng

Deceitful...

詭

Crafty, Deceitful, Sly, Sneaky

譎

Deceitful, Sneaky

諞

Deceitful, Deceive

陰險

Cunning, Deceitful

背信棄義

Breach of, Break one's, Deceitful, Perfidious, Perfidy, Untrustworthy