IPA: /ˈkuːlˌhɛdɪd/
KK: /kulˈhɛdɪd/
Someone who remains calm and composed, especially in difficult situations.
Even during the crisis, she remained coolheaded and made the right decisions.
Coolheaded → It is formed from "cool" (from Old English *col*, meaning moderately cold) and "headed" (from Old English *heafod*, meaning head). The word "coolheaded" describes someone who remains calm and composed, as if their head is cool under pressure.
Think of someone who stays 'calm' ('cool') and 'in control' ('headed') during stressful situations.