mis·be·lieve 
(mĭs′bĭ-lēv)
(mĭs′bĭ-lēv)intr.v. mis·be·lieved, mis·be·liev·ing, mis·be·lieves
v.intr.
Archaic To hold a false or erroneous belief or opinion, especially in religious matters.
v.tr.
1. Archaic To believe falsely or erroneously in (a doctrine or opinion, for example).
2. To refuse to believe; disbelieve.
mis′be·liever n.