John speaks of the sky as if it had a door that can be opened to let rain fall or closed to stop the rain. AT: "to keep rain from falling from the sky" (See: [[rc://en/ta/man/translate/figs-metaphor]])
John speaks of the plagues as if they were a stick that someone could hit the earth with. AT: "to cause all kinds of trouble to occur on earth" (See: [[rc://en/ta/man/translate/figs-metaphor]])
This is an extremely deep narrow hole. Possible meanings are 1) the pit has no bottom; it continues to go down further forever or 2) the pit is so deep that it is as if it had no bottom. See how you translated this in [Revelation 9:1](../09/01.md).