disbelieve

verb (used with object), dis·be·lieved, dis·be·liev·ing.

1. to have no belief in; refuse or reject belief in: to disbelieve reports of UFO sightings.

verb (used without object), dis·be·lieved, dis·be·liev·ing.

2. to refuse or reject belief; have no belief.

verb

1. (tr) to reject as false or lying; refuse to accept as true or truthful
2. (intr usually foll by in) to have no faith (in)disbelieve in God