ἄζυμος unleavened, i.e. (figuratively) uncorrupted; (in the neutral plural) specially (by implication) the Passover weekDerivation: from G1 (as a negative particle) and G2219;KJV Usage: unleavened (bread). G1 G2219
Thayer:1) unfermented, free from leaven or yeast 1a) of the unleavened loaves used in the paschal feast of the Jews 1b) metaph. free from faults or the "leaven of iniquity"
ἄζυμος azumos ad'-zoo-mos From G1 (as a negative particle) and G2219; unleavened, that is, (figuratively) uncorrupted; (in the neuter plural) specifically (by implication) the Passover weekKJV Usage: unleavened (bread).