'Certain' in the Bible

For it shall be, that on the day thou goest out, and passest over the brook Kidron, thou shalt know for certain that thou shalt surely die: thy blood shall be upon thine own head.

And the king sent and called for Shimei, and said unto him, Did I not make thee to swear by the LORD, and protested unto thee, saying, Know for a certain, on the day thou goest out, and walkest abroad any whither, that thou shalt surely die? and thou saidst unto me, The word that I have heard is good.

And on the borders that were between the ledges were lions, oxen, and cherubims: and upon the ledges there was a base above: and beneath the lions and oxen were certain additions made of thin work.

That Hadad fled, he and certain Edomites of his father's servants with him, to go into Egypt; Hadad being yet a little child.

And a certain man of the sons of the prophets said unto his neighbour in the word of the LORD, Smite me, I pray thee. And the man refused to smite him.

And a certain man drew a bow at a venture, and smote the king of Israel between the joints of the harness: wherefore he said unto the driver of his chariot, Turn thine hand, and carry me out of the host; for I am wounded.