exhaustion       
noun [ U ] uk/ɪɡˈzɔːs.tʃən/ us/ɪɡˈzɑː.tʃən/
B2 精疲力竭;疲惫不堪
the state of being extremely tired
  She felt ill with/from exhaustion. 她过于劳累,病倒了。 
 - More examples
 - As they approached the end of the marathon, the runners looked near exhaustion.
 - Recovering from the utter exhaustion of such a long and difficult labour might take the mother several days.
 - She was taken into hospital suffering from exhaustion brought on by stress.
 - Ill with exhaustion, the expedition team had no strength left to make themselves a shelter.
 - The poor overworked horse collapsed from exhaustion and had to be put down.