Junub is a word used in Islam to describe the state of being ritually impure. It happens when a person comes into contact with things that are considered impure, such as urine, feces, or sexual fluids. When this happens, the person is required to perform a specific type of purification ritual called "wudu" or "ghusl" (depending on the level of impurity).
Think of it like this - you know how when you get muddy playing outside, you have to take a bath to get clean again? It's kinda like that! But instead of just regular dirt, it's something that is considered spiritually impure.
So, if someone is in a state of junub, they need to take a bath or perform wudu in order to become ritually pure again. This is an important part of following Islam and being a Muslim.