'Deep' in the Bible

Don't consider your servant a wicked woman, for until now I have spoken from my deep pain and anguish."

And David put his hand in his bag and took out a stone and sent it from his leather band straight at the Philistine, and the stone went deep into his brow, and he went down to the earth, falling on his face.

So David took the spear and the cruse of water from Saul's bolster; and they gat them away, and no man saw it, nor knew it, neither awaked: for they were all asleep; because a deep sleep from the LORD was fallen upon them.