'Known' in the Bible

And Boaz answereth and saith to her, 'It hath thoroughly been declared to me all that thou hast done with thy mother-in-law, after the death of thy husband, and thou dost leave thy father, and thy mother, and the land of thy birth, and dost come in unto a people which thou hast not known heretofore.

Wash thyself therefore, and anoint thee, and put thy raiment upon thee, and get thee down to the floor: but make not thyself known unto the man, until he shall have done eating and drinking.

and it cometh to pass when he lieth down, that thou hast known the place where he lieth down, and hast gone in, and uncovered his feet, and lain down, -- and he doth declare to thee that which thou dost do.'

And she lay at his feet until the morning: and she rose up before one could know another. And he said, Let it not be known that a woman came into the floor.