'Surely' in the Bible

Joab said, “As God lives, if you had not spoken, then the people certainly would have stopped pursuing their brothers in the morning.”

David inquired of the Lord, saying, “Shall I go up against the Philistines? Will You hand them over to me?” And the Lord said to David, “Go up, for I will certainly hand them over to you.”

David said to him, “Do not be afraid, for I will certainly show you kindness for the sake of your father Jonathan, and will restore to you all the land of your grandfather Saul; and you shall always eat at my table.”

The messenger said to David, “The men indeed prevailed against us and came out to us in the field, but we were on them and pushed them as far as the entrance of the [city] gate.

Nevertheless, because by this deed you have given [a great] opportunity to the enemies of the Lord to blaspheme [Him], the son that is born to you shall certainly die.”