phleg·mat·ic 
/flɛgˈmætɪk/ adjective
/flɛgˈmætɪk/ adjective [more phlegmatic; most phlegmatic] literary : not easily upset, excited, or angered
▪ our phlegmatic leader ▪ She was phlegmatic [=calm] even during the most difficult moments of the crisis.
▪ our phlegmatic leader ▪ She was phlegmatic [=calm] even during the most difficult moments of the crisis.
