Strong's G2219 — ζύμη (noun)
zume (dzoo'-may) n.
1. a fermenting agent (as if boiling up)
2. (specially) leaven
3. (figuratively, good or bad) a thorough, utterly complete change agent affecting itself and others
4. (negatively) moral or mental corruption, depravity
5. (positively) purity, integrity, a perfect condition
[probably from G2204]
KJV: leaven 
Root(s): G2204 
Hebrew root: ζέω
Occurrences: 13