Coolness under pressure is a phrase used to describe a person's ability to remain calm and composed in difficult or stressful situations. The term can be broken down into three crossword solutions: SANGFROID (9 letters), NERVE (5 letters), and POISE (5 letters). SANGFROID is a French word meaning 'COOLNESS' or 'IMPERTURBABILITY'. NERVE refers to a person's courage and determination in the face of adversity. POISE is the quality of being graceful and self-assured. Together, these three words describe the ability to stay cool and collected under pressure.