composure
noun [ U ] uk/kəmˈpəʊ.ʒər/ us/kəmˈpoʊ.ʒɚ/
镇静，沉着，泰然自若
the feeling of being calm, confident, and in control
I didn't want to lose my composure in front of her. 我不想在她面前失态。
Synonyms: calm calmnesscool (CALM) equanimity phlegm (CALMNESS) sangfroid