The phrase "burn out" refers to the feeling of being exhausted, overwhelmed, and drained as a result of prolonged stress or overworking. There are a variety of synonyms that can be used to describe this state, including exhaustion, weariness, fatigue, depletion, and depletion. Other terms that can be used to convey a similar meaning include collapse, breakdown, breakdown, and breakdown. These synonyms reflect varying degrees of intensity and can be used in different contexts depending on the situation. Overall, these terms help to convey the gravity of the experience of burnout and the toll that it can take on individuals.