misbeliever

There is something terrible in the fierce exultation which fanaticism experienced in the agonies of the misbeliever.

The misbeliever is an alien to whom it is a sin even to say "God speed."

So far as a Christian man can be with one, who, though a very noble being, is yet a misbeliever.

Entreat them well, but see that they neither escape nor communicate with anyone in this army, Christian or misbeliever.

Averroes himself was accused of having been first a Mussulman, then a Christian, then a Jew, and finally a misbeliever.