What is the answer? I have no words.

If you already feel that there are no more words and languages to answer, you can express them directly. It can be said: "I have said everything I know. If you have any questions about this question, we can find more answers together. " Or "I don't have a better answer for the time being. We can think about the real problem together and then come back to think about the answer. " These answers can show your humility and respect, and also provide the possibility for more discussions in the future.