burnout

noun
🔊/ˈbɜːnaʊt/
🔊/ˈbɜːrnaʊt/
[countable, uncountable]
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  1. the state of being extremely tired or ill, either physically or mentally, because you have worked too hard精疲力竭;过度劳累Topics Illnessc2
  2. the point at which a rocket has used all of its fuel and has no more power (火箭)熄火点,燃烧终止