Dict: strongs - disbelieve
Strongs:
G544 @ ἀπειθέω apeitheō ap-i-theh'-o From G545; to disbelieve (wilfully and perversely): - not believe disobedient obey not unbelieving.
G569 @ ἀπιστέω apisteō ap-is-teh'-o From G571; to be unbelieving that is (transitively) disbelieve or (by implication) disobey: - believe not.