burnout

[burn-out]
noun
1.
a fire that is totally destructive of something.
2.
Also, burn-out. fatigue, frustration, or apathy resulting from prolonged stress, overwork, or intense activity.
3.
Rocketry.
a.
the termination of effective combustion in a rocket engine, due to exhaustion of propellant.
b.
the end of the powered portion of a rocket's flight.
4.
Electricity. the breakdown of a lamp, motor, or other electrical device due to the heat created by the current flowing through it.

Origin:
1900–05; noun use of verb phrase burn out

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Etymonline
Word Origin & History

burnout
"drug user," early 1970s slang, from burn + out. Meaning "mental exhaustion from continuous effort" is from 1975.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
If the photos were adjusted so you could see the stars you would not be able to
  see anything but burnout on the objects shown.
In the aftermath of the dot-com burnout, cash-hungry search engines turned to
  paid inclusion as a new source of revenue.
The system kept turning on and off, resulting in the burnout of a water pump.
Whether or not these people have families this leads to burnout and is
  therefore wasteful.
Images for burnout
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