ζύμη, -ης, ἡ [in LXX for חָמֵץ, Refs Exo.12:16 13:3 23:18 34:25, Deu.16:3; שְׂאֹר, Refs Exo.12:16, 19 13:7, Lev.2:11, Deu.16:4 * ;] leaven: Refs Mat.13:33, Luk.13:21; τ. ἄρτου, Mat.16:12. Metaph., of a moral influence or tendency, always, exc. in the Parable of the Leaven (Refs Mat.13:33, Luk.13:21), for evil: Refs 1Co.5:6-8, Gal.5:9; ζ. τ. Φαρισαίων, Refs Mat.16:6, 11, Mrk.8:16, Luk.12:1 (Cremer, 723).† (AS)
1) leaven 2) metaph. of inveterate mental and moral corruption, viewed in its tendency to infect othersLeaven is applied to that which, though small in quantity, yet by its influence thoroughly pervades a thing; either in a good sense as in the parable Mat. 13:33; or in a bad sense, of a pernicious influence, "a little leaven leaveneth the whole lump"
Probably from G2204; ferment (as if boiling up)
A primary verb; to behot (boil, of liquids; or glow, of solids), that is, (figuratively) befervid (earnest)
KJV Usage: be fervent.
From G2204; boiled, that is, (by implication) calid (figuratively fervent)
KJV Usage: hot.
From G2204; properly heat, that is, (figuratively) “zeal” (in a favorable sense, ardor; in an unfavorable one, jealousy, as of a husband [figuratively of God], or an enemy, malice)