Bible Greek and Hebrew Dictionaries combined for Word Studies
Genesis Chapter 1
faithless 0571 # apistos {ap'-is-tos}; from 1 (as a negative particle) and 4103; (actively) disbelieving, i.e. without Christian faith (specially, a heathen); (passively) untrustworthy (person), or incredible (thing): -- that believeth not, {faithless}, incredible thing, infidel, unbeliever(-ing).