pit

Definition:

A pit is a deep hole that has been dug in the ground.

People dig pits for the purpose of trapping animals or finding water.
A pit can also be used as a temporary place to hold a prisoner.
Sometimes the phrase "the pit" refers to the grave or to hell. Other times it may refer to "the abyss."
A very deep pit can also be called a "cistern."
The term "pit" is also used figuratively in phrases such as, "pit of destruction" which describes being trapped in a disastrous situation or being deeply involved in sinful, destructive practices.

(See also: abyss · hell · prison)