'Opening' in the Bible

Since they couldn't bring him to Jesus because of the crowd, they made an opening in the roof over the place where he was. They dug through it and let down the mat on which the paralyzed man was lying.

but I was let down in a basket through an opening in the wall and escaped from him.

A spring cannot pour both fresh and brackish water from the same opening, can it?

But the earth helped the woman by opening its mouth and swallowing the river that the dragon had spewed from its mouth.