'Understand' in the Bible

He assumed his brothers would understand that God would give them deliverance through him, but they did not understand.

When Philip ran up to it, he heard him reading the prophet Isaiah, and said, “Do you understand what you’re reading?”

Then Peter began to speak: “Now I really understand that God doesn’t show favoritism,

when He said,Go to these people and say:You will listen and listen,yet never understand;and you will look and look,yet never perceive.

For the hearts of these peoplehave grown callous,their ears are hard of hearing,and they have shut their eyes;otherwise they might see with their eyesand hear with their ears,understand with their heart,and be converted,and I would heal them.