burn out

verb

1. to become or cause to become worn out or inoperative as a result of heat or friction

   the clutch burnt out

2. intr (of a rocket, jet engine, etc) to cease functioning as a result of exhaustion of the fuel supply
3. tr; usually passive to destroy by fire
4. to become or cause to become exhausted through overwork or dissipation

noun

1. the failure of a mechanical device from excessive heating
2. a total loss of energy and interest and an inability to function effectively, experienced as a result of excessive demands upon one's resources or chronic overwork