Antonyms for "terrorstricken" include brave, fearless, confident, composed, calm, collected, undaunted, and unafraid. These words denote a lack of fear or anxiety in the face of danger, uncertainty, or discomfort. Someone who is brave is able to face challenges with courage and determination, while someone who is fearless is not afraid of anything. A person who is confident has faith in their abilities and does not doubt themselves. Being composed means that one is calm and in control of their emotions and actions, even in stressful situations. Similarly, being calm and collected means that one is cool-headed and able to think rationally in difficult circumstances. Being undaunted means that one is not intimidated or discouraged by challenges, while being unafraid means that one is not scared or anxious.