'Certain' in the Bible

Now there was a certain man of Ramathaimzophim, of mount Ephraim, and his name was Elkanah, the son of Jeroham, the son of Elihu, the son of Tohu, the son of Zuph, an Ephrathite:

and to Hannah he giveth a certain portion -- double, for he hath loved Hannah, and Jehovah hath shut her womb;

If it goes by the land of Israel to Beth-shemesh, then this great evil is his work; but if not, then we may be certain that the evil was not his doing, but was the working of chance.

And Saul said to his uncle, He told us for certain that the asses were found. But of the matter of the kingdom, of which Samuel had spoken, he told him not.

But certain worthless men said, “How can this one deliver us?” And they despised him and did not bring him any present. But he kept silent.

And the men of Israel said, Have you seen this man? Clearly he has come out to put shame on Israel: and it is certain that if any man overcomes him, the king will give that man great wealth, and will give him his daughter, and make his father's family free in Israel.

Then Jonathan said, "Far be it from you! For if I know for certain that {my father decided evil should come upon you}, would I not have told it to you?"

David answered Ahimelech the priest, “The king gave me a mission, but he told me, ‘Don’t let anyone know anything about the mission I’m sending you on or what I have ordered you to do.’ I have stationed my young men at a certain place.

Now a certain man of the servants of Saul was there that day, detained before the LORD; and his name was Doeg, an Edomite, the chiefest of the herdmen that belonged to Saul.

And David said to Abiathar, I was certain that day, when Doeg the Edomite was there, that he would take the news to Saul: I am responsible for the lives of all your father's family.

Then said David, Jehovah, God of Israel, thy servant hath heard for certain that Saul seeketh to come to Keilah, to destroy the city for my sake.

And said to him, Have no fear, for Saul my father will not get you into his power; and you will be king of Israel, and I will be by your side, and my father Saul is certain of this.

Go, please, make certain again! Find out and see {exactly where he is} and who has seen him there! For they have said to me, 'He [is] very cunning.'

So look, and take note of all the places where he hides and come back to me with the established facts, then I will go with you. If he is [anywhere] in the land, I will search him out among all the thousands of Judah.”

“Now I know for certain you will be king, and the kingdom of Israel will be established in your hand.

Now consider carefully what you must do, because there is certain to be trouble for our master and his entire family. He is such a worthless fool nobody can talk to him!”

Please forgive your servant’s offense, for the Lord is certain to make a lasting dynasty for my lord because he fights the Lord’s battles. Throughout your life, may evil not be found in you.

So David sent out spies and knew for certain that Saul had come.