'Secretly' in the Bible

Then the king got up in the night and said to his servants, This is my idea of what the Aramaeans have done to us. They have knowledge that we are without food; and so they have gone out of their tents, and are waiting secretly in the open country, saying, When they come out of the town, we will take them living and get into the town.

Jehosheba, who was King Jehoram’s daughter and Ahaziah’s sister, secretly rescued Joash son of Ahaziah from the king’s sons who were being killed and put him and the one who nursed him in a bedroom. So he was hidden from Athaliah and was not killed.

And the children of Israel did secretly those things that were not right against the LORD their God, and they built them high places in all their cities, from the tower of the watchmen to the fenced city.