burnout
noun /ˈbɜːnaʊt/
/ˈbɜːrnaʊt/
[countable, uncountable]- 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 - 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