'Understand' in the Bible

For he thought that his brethren would understand that God by his hand was giving them deliverance. But they understood not.

saying, Go to this people, and say, Hearing ye shall hear and not understand, and seeing ye shall see and not perceive.

For the heart of this people has become fat, and they hear heavily with their ears, and they have closed their eyes; lest they should see with their eyes, and hear with their ears, and understand with their heart, and be converted, and I should heal them.