burnout

US /ˈbɝːn.aʊt/
UK /ˈbɝːn.aʊt/
"burnout" picture
1.

physical or mental collapse caused by overwork or stress

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She experienced severe burnout after months of working 80-hour weeks.
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To avoid burnout, it's important to take regular breaks.
:
exhaustionfatiguecollapsebreakdownstressoverwork
2.

the point at which a rocket or jet engine stops functioning because all its fuel has been used

:
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The spacecraft reached burnout of its first stage.
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After burnout, the spent stage separated from the main rocket.