choleric

1. ADJ A choleric person gets angry very easily. You can also use choleric to describe a person who is very angry. 性情暴躁的[正式]

...his choleric disposition. ...他易怒的天性。

He was affable at one moment, choleric the next. 他時(shí)而友善和藹，時(shí)而暴躁易怒。