'Understand' in the Bible

And he thought his brothers would understand that God was granting deliverance to them by his hand, but they did not understand.

So Philip ran up to [it] [and] heard him reading aloud Isaiah the prophet and said, "So then, do you understand what you are reading?"

So Peter opened [his] mouth [and] said, "In truth I understand that God is not one who shows partiality,

saying, 'Go to this people and say, "{You will keep on hearing} and will never understand, and {you will keep on seeing} and will never perceive.

For the heart of this people has become dull, and with [their] ears they hear with difficulty, and they have shut their eyes, lest they see with [their] eyes, and hear with [their] ears, and understand with [their] heart, and turn, and I would heal them." '