Treacherous.

Infamous, villainous, treacherous.

Of persons, their attributes or actions: Deceitful, treacherous, faithless. Formerly often pleonastically, expressing detestation, with nouns like tr…

Treacherous. (In quots. absol. and quasi-adv.)

Villainous, nefarious, perfidious, infamous.

Of persons, their attributes or actions: Characterized by treachery; deceiving, perfidious, false; disloyal, traitorous.

Having the character of, or characteristic of, a traitor; treacherous; perfidious.

attributive or as adj. That is a traitor, traitorous.

Full of treason; treasonous; treacherous.

= traitorous, adj.

Full of or abounding in treason; characterized by treason or treachery; treasonable.

Of the nature of treason; characteristic of or involving treason; perfidious, treacherous. (Originally Scottish)

Treasonable; traitorous.

Traitorous, treacherous, perfidious.

Not keeping good faith; acting falsely or treacherously. Also absol.

Not to be trusted or relied on; unfaithful, unreliable, treacherous, untrustworthy.

Having the character of a traitor; traitorous.

Having the character attributed to the Carthaginians by the Romans; treacherous, perfidious. Earliest and now only in Punic faith n. at compounds.

Characterized by deceit; treacherous.

characteristic of or resembling Judas Iscariot; wickedly treacherous.

That betrays.

Faithless, dishonest, treacherous.

= traditorous adj.

of or relating to Judas Iscariot.