Over millions of years, tiny dust particles in the solar nebula began to coalesce into larger planetesimals.
数百万年间，太阳星云中的微小尘埃颗粒开始合并成更大的星子。
Which choice best defines “coalesce”?
B — To merge into one whole.. “coalesce” means To merge into one whole..
Which word means “To merge into one whole.”?
D — coalesce. “coalesce” means To merge into one whole..
coalesce — To merge into one whole.. In Chinese: 合并；结合.
coalesce is pronounced //ˌkəʊəˈlɛs//.
Over millions of years, tiny dust particles in the solar nebula began to coalesce into larger planetesimals. (数百万年间，太阳星云中的微小尘埃颗粒开始合并成更大的星子。)
merge, unite, fuse — all close in meaning to coalesce (To merge into one whole.).
separate, divide — each the opposite of coalesce (To merge into one whole.).
Yes. coalesce 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.
co(共) + alesce(生长) → 长到一起 → 融合。