Zymoo (G2220) means to leaven — to cause fermentation that permeates and transforms the whole. Jesus used leaven (zyme) as both a warning metaphor (the leaven of the Pharisees — Matt 16:6, Mark 8:15) and a kingdom metaphor (the woman hiding leaven in flour until all was leavened — Matt 13:33, Luke 13:21). Paul uses it negatively (1 Cor 5:6-7 — 'a little leaven leavens the whole lump') but the principle of pervasive transformation applies in both directions.
The theology of zymoo is about pervasive, invisible transformation. In Paul's context (1 Cor 5:6-7, Gal 5:9), leaven represents sin that, if tolerated, spreads silently through the whole community. In Jesus's kingdom parable (Matt 13:33), the same spreading power describes how the kingdom of God works: invisibly, from small beginnings, transforming everything it touches. The same process that corrupts can sanctify — depending on what is doing the leavening. Christ's presence in the world, in a community, in a life, is kingdom leaven: transforming from within, comprehensive in its reach, unstoppable in its spread.