Despite the sudden power outage during the lecture, the professor maintained remarkable composure and continued her explanation without hesitation.
尽管讲座期间突然停电，教授仍保持非凡的镇定，毫不犹豫地继续讲解。
Which choice best defines “composure”?
D — Calm self-control.. “composure” means Calm self-control..
Which word means “Calm self-control.”?
A — composure. “composure” means Calm self-control..
composure — Calm self-control.. In Chinese: 镇静；沉着.
composure is pronounced //kəmˈpəʊʒə//.
Despite the sudden power outage during the lecture, the professor maintained remarkable composure and continued her explanation without hesitation. (尽管讲座期间突然停电，教授仍保持非凡的镇定，毫不犹豫地继续讲解。)
equanimity, self-possession, serenity — all close in meaning to composure (Calm self-control.).
agitation, panic — each the opposite of composure (Calm self-control.).
Yes. composure is on the SAT Prep Difficult list — the higher-register words that decide the hard questions. The Digital SAT does not test vocabulary in isolation; words like this one are tested through Words in Context questions, where you choose the word that completes a passage most logically and precisely.
compose(使镇定) → 泰然自若。