- not keeping faith; dishonest; disloyal
- unreliable; undependable
- lacking faith; unbelieving
Origin of faithlessMiddle English feithles
- a. Not true to duty or obligation; disloyal or unfaithful.b. Breaking trust in a marriage or relationship by having sexual relations with someone other than one's spouse or sexual partner.
- Having no religious faith.
faithless unfaithful false disloyal traitorous treacherous perfidious
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.
(comparative more faithless, superlative most faithless)
- Lacking faith; lacking belief in something.
- Not believing in God, religion, or a comparable ideology.
- Unfaithful; not of true fidelity; inconstant, as a husband or a wife.
- Not observant of promises or covenants.
- Not true to allegiance, duty, or vows; perfidious; treacherous; disloyal.
- Serving to disappoint or deceive; delusive; unsatisfying.
faith + -less