The term 'deep depression' can be summarized as a CHASM, which is a deep, steep-sided ravine or gorge. It is often used to describe a large gap between two points, such as the difference between two economic classes or the divide between two countries. In terms of mental health, deep depression is a severe form of depression that can cause feelings of hopelessness and despair. It can lead to a range of physical and emotional symptoms, including fatigue, difficulty concentrating, and changes in appetite and sleep patterns.