coolheaded

Từ điển WordNet v3.1 - WordNet Dictionary

adjective

marked by calm self-control (especially in trying circumstances);
unemotional
- play it cool
- keep cool
- stayed coolheaded in the crisis
- the most nerveless winner in the history of the tournament
• Syn:
cool, nerveless
• Similar to:
composed
• Derivationally related forms:
nervelessness (for: nerveless), coolness (for: cool)