Faithless
Faith·less
Faithless
a.
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Not believing; not giving credit.
Be not faithless, but believing.
- Not believing on God or religion; specifically, not believing in the Christian religion.
- Not observant of promises or covenants.
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Not true to allegiance, duty, or vows; perfidious; trecherous; disloyal; not of true fidelity; inconstant, as a husband or a wife.
A most unnatural and faithless service.
- Serving to disappoint or deceive; delusive; unsatisfying.