Faithless

Webster's Dictionary of the English Language

·adj Not believing; not giving credit.

II. Faithless ·adj Not observant of promises or covenants.

III. Faithless ·adj Serving to disappoint or deceive; delusive; unsatisfying.

IV. Faithless ·adj Not believing on God or religion; specifically, not believing in the Christian religion.

V. Faithless ·adj Not true to allegiance, duty, or vows; perfidious; trecherous; disloyal; not of true fidelity; inconstant, as a husband or a wife.