'Understand' in the Bible

Then Eliakim the son of Hilkiah, and Shebna and Joah, said to the Rabshakeh, “Please speak to your servants in the Aramaic (Syrian) language, because we understand it; and do not speak with us in the Judean (Hebrew) language in the hearing of the people who are on the wall.”

Now, O Lord our God, please, save us from his hand so that all the kingdoms of the earth may know [without any doubt] that You alone, O Lord, are God.”