'Knew' in the Bible

And when Joab was come out from David, he sent messengers after Abner, and they brought him back from the well of Sirah: but David knew it not.

And it came to pass, when Joab kept watch upon the city, that he assigned Uriah unto the place where he knew that valiant men were.

it shall be that, if the king's wrath arise, and he say unto thee, Wherefore went ye so nigh unto the city to fight? knew ye not that they would shoot from the wall?

And with Absalom went two hundred men out of Jerusalem, that were invited, and went in their simplicity; and they knew not anything.

And the king said, Is it well with the young man Absalom? And Ahimaaz answered, When Joab sent the king's servant, even me thy servant, I saw a great tumult, but I knew not what it was.