'Knew' in the Bible

And the damsel was very fair, and cherished the king, and ministered to him: but the king knew her not.

and Jehovah hath turned back his blood on his own head, who hath fallen on two men more righteous and better than he, and slayeth them with the sword, -- and my father David knew not -- Abner son of Ner, head of the host of Israel, and Amasa son of Jether, head of the host of Judah;

"You knew David my father, that he was not able to build a house for the name of Yahweh his God, {in view of the warfare} which surrounded him, until Yahweh placed them under the soles of his feet.

And Hiram sent his servants with the fleet, sailors who knew the sea, along with the servants of Solomon.

And as Obadiah was in the way, behold, Elijah met him: and he knew him, and fell on his face, and said, Art thou that my lord Elijah?