irritability       
noun [ U ] uk/ˌɪr.ɪ.təˈbɪl.ə.ti/ us/ˌɪr.ə.t̬əˈbɪl.ə.t̬i/
 易怒性情,暴脾气
the quality of becoming annoyed very easily
  The drug can cause irritability.  这种药会引起烦躁。 
 Symptoms may include depression, irritability, and anxiety. 症状可能包括抑郁、易怒和焦虑。 
 See: irritable
 - More examples
 - We have all experienced the irritability that comes from missing breakfast.
 - Coffee can decrease concentration and increase irritability.
 - Instead of calming you down, alcohol enhances irritability.