'Certainly' in the Bible

The king answered and said, "{Certainly} I know that {you are trying to gain time} {because} you have seen {that this matter is firmly decreed by me},

The king replied to Daniel, "Certainly your God is a God of gods and Lord of kings and revealer of mysteries, for you were able to reveal this mystery!"

Then Nebuchadnezzar the king hath been astonished, and hath risen in haste; he hath answered and said to his counsellors, 'Have we not cast three men into the midst of the fire -- bound?' They have answered and are saying to the king, 'Certainly, O king.'

But his sons shall be stirred up, and shall assemble a multitude of great forces: and one shall certainly come, and overflow, and pass through: then shall he return, and be stirred up, even to his fortress.

For the king of the north shall return, and shall set forth a multitude greater than the former, and shall certainly come after certain years with a great army and with much riches.