In proverbial and allusive phrases referring to the serpent's guile, treachery, or malignancy. †the serpent's tongue, popularly supposed to be the…

A traitor; a betrayer.

A traitor; a person who betrays someone or something. Now rare.

One who betrays: in various senses of the verb.

A traitor, a betrayer. Cf. traditor, n. 1. Obsolete. rare.

The surname of Judas, the disciple who betrayed Jesus Christ. Hence, an appellation for an accursed traitor. Also attributive.

A person who double-crosses another or others; a treacherous or duplicitous person, a swindler or cheat.