'Secret' in the Bible

But he himself, turning back from the stone images at Gilgal, said, I have something to say to you in secret, O king. And he said, Let there be quiet. Then all those who were waiting before him went out.

Then he went to his father's house at Ophrah, and put his brothers, the seventy sons of Jerubbaal, to death on the same stone; however, Jotham, the youngest, kept himself safe by going away to a secret place.

And the townsmen of Shechem put secret watchers on the tops of the mountains, and they made attacks on all who went by on the road and took their goods; and word of this came to Abimelech.

And the chiefs of the Philistines came up to her, and said to her, Make use of your power over him and see what is the secret of his great strength, and how we may get the better of him, and put bands on him, so that we may make him feeble; and every one of us will give you eleven hundred shekels of silver.

So Delilah said to Samson, Make clear to me now what is the secret of your great strength, and how you may be put in bands and made feeble.

Now she had men waiting secretly in the inner room; and she said to him, The Philistines are on you, Samson. And the cords were broken by him as a twist of thread is broken when touched by a flame. So the secret of his strength did not come to light.

And she said to him, Why do you say you are my lover when your heart is not mine? Three times you have made sport of me, and have not made clear to me the secret of your great strength.