Sentence examples for a deep hole from inspiring English sources

"a deep hole" is a correct and usable phrase in written English.
It can be used to describe a physical hole that is very deep, or as a metaphor for a difficult or challenging situation. Example 1 (physical hole): The workers dug a deep hole in the ground to lay the foundation for the new building. Example 2 (metaphorical): After losing his job and going through a messy divorce, John felt like he was in a deep hole and didn't know how to climb out.