What are the opposite words for more terror-stricken?

The word terror-stricken denotes extreme fear and panic that one undergoes during a terrifying event. The antonyms for this word, on the other hand, signify a state of being calm and composed. Some alternatives for terror-stricken would be collected, composed, cool, dispassionate, imperturbed, indifferent, relaxed, and serene. These words exactly oppose the notion of terror-stricken and portray stability, tranquility, and self-control. It is essential to understand the difference between these opposite words, as similes and metaphors are commonly used in literature, and using the right words can create a perfect impression in the reader's mind.