burnout
nounUK /ˈbɜːnaʊt/
US /ˈbɝːnaʊt/
Feeling very tired and unhappy because you worked too hard for too long.
After months of studying every night, she felt complete burnout.
OTHER MEANINGS
2. The moment when a rocket or jet engine stops burning fuel and its flame goes out.
The rocket's burnout happened just after it left the atmosphere.
3. The failure of an electrical device or light bulb because it has been used too much.
The old bulb's burnout left the room dark.
4. The point in a race or activity when someone uses up all their energy and cannot continue.
The runner hit burnout halfway through the marathon.