Did you mean to use the word "apposed" which means, "to put before; apply (one thing) to another; to place in juxtaposition or proximity?"
There are two kinds of leaven mentioned in the Bible. One is the leaven of the Pharisees and Sadducees, the other is the leaven of the Woman. The leaven of the Pharisees and Saducees is the leaven of which we should beware. The Pharisee’s leaven was/is sensuousness, self-righteousness, vanity and hypocrisy. If one wanted to compare that to "rot", I suppose one could say that sensuousness, self-righteousness, vanity and hypocrisy "rot" the moral character and moral fabric of individuals and countries but I think it has little to do with a Jewish kitchen. (I have seen a dirty Jewish kitchen. One of the jokes I've heard from my Jewish friends is that there is NO such thing as a Jewish kitchen, "we make reservations." Perhaps that's why they are generally neat and clean.) All "leavenity" aside, the leaven the woman hid in three measures of meal---in modes of human thought--- is a different kind of leaven, in that it is Truth. "Meal" in the Bible stands for healing. The Woman's leaven is NOT that of the hypocritical Pharisees but of God's Christ, Truth. This leaven of Truth is changing the whole of thought until the all of evil thought is changed into Truth. Woman plays a very important role in Biblical history. The golden thread of Truth and prophecy come through her from Old Testament times to the New, culminating in Mary giving birth to Jesus and the beautiful Woman in the Apocalypse clothed with the sun with the moon under her feet and a crown of twelve stars. She opposes the dragon and is the opposite of the wicked woman Jezebel and is finally given the wings of an eagle to fly away to her place and be nourished. Her babe that the dragon is so intent on destroying is Truth. The dragon, serpent, satin, devil (Rev 12:9) is the lie and the liar that Jesus said he was in John 8:44. A lie always tries to destroy the Truth, but never will or can. Truth ALWAYS destroys a lie.-----I think the point should be that everything is a matter of human interpretation and it seems to me that what is most important is to gain the SPIRITUAL import of the Scriptures of which there is only one. It is not mine or yours but God's, given to each of us in the quiet of silent prayer. I agree that word definitions are MOST important and useful in discovering the spiritual aspect of the Scriptures, but only to that end.-------Sometimes the analogies people make about very serious spiritual things, are worse than silly. They steer our thought away from contemplating the Word of God. I would much rather "be silent, and know that I am God" than listen to someone tell me about Jewish kitchens. You said you heard this from someone. I think I would steer clear of that someone.