'Understand' in the Bible

Then said Eliakim the son of Hilkiah, and Shebna, and Joah, unto Rabshakeh, Speak, I pray thee, to thy servants in the Syrian language; for we understand it: and talk not with us in the Jews' language in the ears of the people that 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.”