Dict: strongs - infidel

Strongs:

H2184 @ זנוּת zenûth zen-ooth' From H2181; {adultery} that {is} (figuratively) {infidelity} idolatry: - whoredom.

G571 @ ἄπιστος apistos ap'-is-tos From G1 (as a negative particle) and G4103; (actively) disbelieving that is without Christian faith (specifically a heathen); (passively) untrustworthy (person) or incredible (thing): - that believeth not faithless incredible thing infidel unbeliever (-ing).