'Secrecy' in the Bible

"If your brother, the son of your mother or your son or your daughter {or your wife whom you embrace} or {your intimate friend} in secrecy {says}, 'Let us go and let us serve other gods!' [gods] that you and your ancestors have not known,

"Stolen waters are sweet, and bread of secrecy is pleasant."

I have spoken not in secrecy, in a place, a land, of darkness, I have not said to the descendants of Jacob, 'Seek me {in vain}!' I, Yahweh, [am] speaking righteousness, declaring uprightness.

Draw near to me; hear this! I have not spoken in secrecy from [the] {beginning}; from [the] time {it came to be}, there I [have been]; And now the Lord Yahweh has sent me and his Spirit."

Then King Zedekiah sent and fetched him. And the king questioned him in secrecy in his house, and he said, "Is there a word from Yahweh?" And Jeremiah said, "There is." And he said, "You will be given into the hand of the king of Babylon."

Then Johanan the son of Kareah said to Gedaliah in secrecy at Mizpah, {saying}, "Please let me go and kill Ishmael the son of Nethaniah, and {nobody} will know. Why should he kill you, so that all of Judah who are gathered to you will be scattered, and the remnant of Judah will perish?"