Word: apistew

Pronounce: ap-is-teh'-o

Strongs Number: G569

Orig: from 571; to be unbelieving, i.e. (transitively) disbelieve, or (by implication) disobey:--believe not. G571

Use: TDNT-6:174,849 Verb

Heb Strong:

1) to betray a trust, be unfaithful
2) to have no belief, disbelieve