'Certainly' in the Bible

Then David inquired of the Lord: “Should I go to war against the Philistines? Will you hand them over to me?”The Lord replied to David, “Go, for I will certainly hand the Philistines over to you.”

And David saith to him, 'Be not afraid; for I certainly do with thee kindness because of Jonathan thy father, and have given back to thee all the field of Saul thy father, and thou dost eat bread at my table continually.'

Nathan responded to David, "There's one other thing: the LORD has forgiven your sin. You won't die. Nevertheless, because you have despised the LORD's enemies with utter contempt, the son born to you will most certainly die."

The king replied, "Bring anyone who talks to you about this to me, and he certainly won't be bothering you anymore!"

We will certainly die and be like water poured out on the ground, which can’t be recovered. But God would not take away a life; He would devise plans so that the one banished from Him does not remain banished.

for a vow hath thy servant vowed in my dwelling in Geshur, in Aram, saying, If Jehovah doth certainly bring me back to Jerusalem, then I have served Jehovah.'

But he will certainly have taken cover now in some hole or secret place; and if some of our people, at the first attack, are overcome, then any hearing of it will say, There is destruction among the people who are on Absalom's side.

And he [is] also a {valiant warrior}, whose heart [is] like the heart of the lion. He will {certainly melt} with fear, for all Israel knows that your father [is] a mighty warrior and [those] who [are] with him [are] {valiant warriors}.

and now, send hastily, and declare to David, saying, Lodge not to-night in the plains of the wilderness, and also, certainly pass over, lest there be a swallowing up of the king and of all the people who are with him.'

and David sendeth the third of the people by the hand of Joab, and the third by the hand of Abishai, son of Zeruiah, brother of Joab, and the third by the hand of Ittai the Gittite, and the king saith unto the people, 'I certainly go out -- I also -- with you.'

Most certainly my house is not so with God, yet he has made with me an everlasting covenant, ordered in all things, and sure, for it is all my salvation, and all [my] desire, although he doesn't make it grow.

Then the king said to Araunah, "No, but {I will certainly buy} it from you for a price; I don't want to offer to Yahweh my God burnt offerings that cost me nothing." So David bought the threshing floor and the cattle for fifty shekels of silver.