'Understand' in the Bible

Is it not the wheat harvest today? I'll call upon the LORD, and he will send thunder and rain. Then you will know and understand that you have done a great evil in the sight of the LORD by asking for a king for yourselves."

Looke, my father, look! The corner of your robe is in my hand. Indeed, by my cutting off the corner of your robe and not killing you, you may know and understand that I have no evil intent or transgression I haven't wronged you, even though you are hunting me to take my life.