'Understand' in the Bible

Jesus answered him, "Are you the teacher of Israel, and don't understand these things?

They didn't understand that he spoke to them about the Father.

Why don't you understand my speech? Because you can't hear my word.

Jesus spoke this parable to them, but they didn't understand what he was telling them.

His disciples didn't understand these things at first, but when Jesus was glorified, then they remembered that these things were written about him, and that they had done these things to him.

Jesus answered him, "You don't know what I am doing now, but you will understand later."