G571

ἄπιστος

apistos (ap'-is-tos) adj.
1. (actively) disbelieving, i.e. without Christian faith
2. (specially) a heathen
3. (passively) untrustworthy (person) or unbelievable, incredible (thing)
[from G1 (as a negative particle) and G4103]
KJV: that believeth not, faithless, incredible thing, infidel, unbeliever(-ing)
Root(s): G1, G4103
G1
G4103