'Understood' in the Bible

Right away Jesus understood in His spirit that they were thinking like this within themselves and said to them, “Why are you thinking these things in your hearts?

because they had not understood about the loaves. Instead, their hearts were hardened.

But they understood not that saying, and were afraid to ask him.

And they were seeking to seize Him, and yet they feared the people, for they understood that He spoke the parable against them. And so they left Him and went away.