'Surely' in the Bible

So the king sent word and called for Shimei and said to him, “Did I not make you swear by the Lord and solemnly warn you, saying, ‘Know for certain that on the day you leave [Jerusalem] and go anywhere, you shall surely die’? And you said to me, ‘The word (ruling) I have heard is good.’

“I have certainly built You a lofty house,A place for You to dwell in forever.”

from the very nations of whom the Lord said to the Israelites, “You shall not associate with them, nor shall they associate with you, for the result will be that they will turn away your hearts to follow their gods.” Yet Solomon clung to these in love.

Therefore the Lord said to Solomon, “Because you have done this and have not kept My covenant and My statutes, which I have commanded you, I will certainly tear the kingdom away from you and give it to your servant.

For the words which he cried out by the word of the Lord against the altar in Bethel and against all the houses of the high places which are in the cities of Samaria shall certainly come to pass.”

Elijah said, “As the Lord of hosts (armies) lives, before whom I stand, I will certainly show myself to Ahab today.”

Now the servants of the king of Aram said to him, “Israel’s god is a god of the hills; that is why they were stronger than we. But let us fight against them in the plain, and surely we will be stronger than they.

and assemble an army like the army that you have lost in battle, horse for horse and chariot for chariot. Then we will fight against them in the plain, and surely we shall be stronger than they.” And he listened to their words and did so.

When the captains of the chariots saw Jehoshaphat, they said, “Surely it is the king of Israel.” They turned to fight against him, and Jehoshaphat shouted out [in fear].