ἀπιστέω (apistéōap-is-teh'-overbto disbelieve)
[Grk] ἀπιστέω LN: 31.39, 31.97, 31.105 GK: G601
Derivation: from ἄπιστος;
Strong's: to be unbelieving, i.e. (transitively) disbelieve, or (by implication) disobey
KJV: --believe not.
See: ἄπιστος