G0571

ἄπιστος

ápistos

/ap'-is-tos/

Definition

(actively) disbelieving, i.e. without Christian faith (specially, a heathen); (passively) untrustworthy (person), or incredible (thing)

from G0001 (as a negative particle) and G4103;

that believeth not, faithless, incredible thing, infidel, unbeliever(-ing).