phlegmatic

/flɛɡˈmætɪk/
adjective
  1. Having a calm, unemotional, and slow-to-react temperament; not easily excited or upset.
    • Even during the crisis, the phlegmatic pilot calmly followed the emergency checklist.
    • My phlegmatic grandfather rarely raised his voice, no matter how chaotic the family dinner became.
    • The teacher's phlegmatic response to the fire alarm helped keep the students from panicking.
What does "phlegmatic" mean? | whatsthatwordmean | whatsthatwordmean