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Unbeliever

noun

Noun

1
One who does not believe, particularly in a deity (used by believers to describe people who do not believe in the same deity or deities as themselves).
"`Well, I suppose that we must try it,' I said; and the others assented in their various ways - Leo, as though it were the best joke in the world; Job, in respectful disgust; and Mahomed, with an invocation to the Prophet, and a comprehensive curse upon all unbelievers and their ways of thought and travel."

From un- + believer, perhaps a corruption of earlier wanbeliever (“unbeliever”).

Unscramble this word: unbeliever