from G1 (as a negative particle) and G2219; unleavened, i.e. (figuratively) uncorrupted; (in the neutral plural) specially (by implication) the Passover week:--unleavened (bread).
unfermented, free from leaven or yeast
of the unleavened loaves used in the paschal feast of the Jews
metaph. free from faults or the "leaven of iniquity"
