Dukkha is a word from Buddhism which means the idea that life is full of suffering. Suffering can come from not getting what you want, from illness or pain, or from difficult situations that happen to you in life. It's important to remember that dukkha doesn't mean life is always bad. It just means that bad things happen and that life can be hard. That's why Buddhism teaches us how to handle these tough times and find peace in the midst of them.