Exhaustion

Part of Speech: Noun

Definition: A state of extreme  physical and mental tiredness

Source: Oxford Dictionaries

Found in ” Choi Jeong Min” By Franny Choi (line 3)

I looked up this word because it’s good to know in which context it was used in the poem and how the speaker used the word.  The author knew that the word placement would mean exactly what the definition was.