tetchiness       
noun [ U ] uk/ˈtetʃ.i.nəs/ us/ˈtetʃ.i.nəs/
 易怒暴躁的性情;情绪易波动的性格
the quality of getting angry or annoyed very easily
  Her tiredness had turned to tetchiness. 她的疲倦变成了暴躁。 
 See: tetchy
 - More examples
 - When we met for our interview he was wary, rather rigid and given to tetchiness.
 - The heatwaves of high summer raise any workplace tetchiness to fever pitch.
 - His ensuing tetchiness at reporters led to a farcical conference.
 - His tetchiness gives the impression that he is a man feeling the stress of his job as interim manager.
 - It was a contrived display of unity which would barely mask the tetchiness and strains allegedly corroding the "special relationship".