'Opening' in the Bible

Then Nebuchadnezzar approached the opening of the blazing fire furnace. He shouted out, "Shadrach, Meshach, and Abednego, servants of the Most High God, come out and come here!" So Shadrach, Meshach, and Abednego came out of the fire.

And Daniel, on hearing that the writing had been signed, went into his house; (now he had windows in his room on the roof opening in the direction of Jerusalem;) and three times a day he went down on his knees in prayer and praise before his God, as he had done before.

A stone was brought and placed over the opening to the pit, and the king affixed a seal to it with his personal signet ring and with the signet rings of his officials so that no one would interfere with Daniel's situation.

Then one whose form was like the sons of men put his finger on my lips; and opening my mouth, I said to him who was before me, O my lord, because of the vision my pains have come on me, and I have no more strength.