He seemed nonchalant about the result, though the notebook showed that he had rerun the calculation eleven times.
他对结果显得满不在乎，笔记本却显示他把计算重做了十一遍。
Which choice best defines “nonchalant”?
B — Casually calm and unconcerned.. “nonchalant” means Casually calm and unconcerned..
Which word means “Casually calm and unconcerned.”?
D — nonchalant. “nonchalant” means Casually calm and unconcerned..
nonchalant — Casually calm and unconcerned.. In Chinese: 冷淡的；漠不关心的.
nonchalant is pronounced //ˈnɒnʃələnt//.
He seemed nonchalant about the result, though the notebook showed that he had rerun the calculation eleven times. (他对结果显得满不在乎，笔记本却显示他把计算重做了十一遍。)
unconcerned, casual, offhand — all close in meaning to nonchalant (Casually calm and unconcerned.).
anxious, agitated — each the opposite of nonchalant (Casually calm and unconcerned.).
Yes. nonchalant 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.
同 nonchalance → 若无其事的。