'Understand' in the Bible

The LORD said, "I have certainly seen the affliction of my people who are in Egypt, and I have heard their cry caused by their slave masters. I really do understand their pain,

Thus says the Lord, “By this you shall know and recognize and acknowledge that I am the Lord: look, with the staff in my hand I will strike the water in the Nile, and it shall be turned to blood.

Pharaoh’s servants said to him, “How long shall this man be a trap to us? Let the men go, so that they may serve the Lord their God. Do you not realize that Egypt is destroyed?”

But against any of the sons of Israel a dog will not even bark, whether against man or beast, that you may understand how the Lord makes a distinction between Egypt and Israel.’

Understand that the Lord has given you the Sabbath; therefore on the sixth day He will give you two days’ worth of bread. Each of you stay where you are; no one is to leave his place on the seventh day.”