These adjectives mean not true to duty or obligation. Faithless and unfaithful imply failure to adhere to promises, obligations, or allegiances: was faithless to her ideals; an unfaithful spouse.False emphasizes deceitfulness: “To thine own self be true,/And it must follow, as the night the day,/Thou canst not then be false to any man” (Shakespeare). One who is disloyal betrays an allegiance: disloyal staff members who exposed the senator's indiscretions.Traitorous most commonly refers to disloyalty to a government or nation: a traitorous double agent.Treacherous suggests a propensity for betraying trust or faith: “She gave the treacherous impulse time to subside” (Henry James). Perfidious suggests vileness of behavior and often deceitfulness: a perfidious assassin.
Even if his decision was brought about by libel on the part of the suitor's friend this was done, and the Code enacted that the faithless friend should not marry the girl.
In 1773 a Don Cossack called Pugachev, who was so uneducated that he could not even sign the manifestoes written for him, declared himself to be Peter III., and announced that he was going to St Petersburg to punish his faithless wife and place his son Paul on the throne.
To this early standard of life and practice Ephraim was faithless in the days of the prophet Hosea (see his oracles passim - especially chaps.
In the younger contemporary prophet of Ephraim, Hosea, the stress is laid on the relation of love (hesed) between Yahweh, the divine husband, and Israel, the faithless spouse.
Josiah himself is praised for his justice, but faithless Judah is insincere (Jer.