Geresh is a Hebrew word that refers to a legal tool used in Jewish law. It is used when a husband wants to divorce his wife.
So, imagine you and your friend are playing with toys. If your friend decides they don't want to play anymore, they might say "I'm done playing with these toys, I don't want to play anymore." This is like saying "I want a divorce" in grown-up talk.
In Jewish law, a man who wants to divorce his wife can say "I give my wife a geresh" which means "I am divorcing my wife". This is like saying "I don't want to play with these toys anymore".
Once the husband gives his wife a geresh, they are legally divorced in Jewish law. It's important to note that this is only for Jewish law and doesn't necessarily mean they are divorced in the eyes of the government.
So, in short, geresh is a legal tool used in Jewish law for a husband to divorce his wife. It's like saying "I don't want to play with these toys anymore".