The tranquil surface of the alpine lake reflected the surrounding peaks, offering a moment of stillness to the hikers.
高山湖泊宁静的水面映照着周围的山峰，为徒步者提供了一个片刻的宁静。
Which choice best defines “tranquil”?
B — Peaceful; calm; serene. “tranquil” means peaceful; calm; serene.
Which word means “peaceful; calm; serene”?
C — tranquil. “tranquil” means peaceful; calm; serene.
tranquil — peaceful; calm; serene. In Chinese: 宁静的；平静的.
tranquil is pronounced /ˈtræŋkwɪl/.
The tranquil surface of the alpine lake reflected the surrounding peaks, offering a moment of stillness to the hikers. (高山湖泊宁静的水面映照着周围的山峰，为徒步者提供了一个片刻的宁静。)
peaceful, calm, serene — all close in meaning to tranquil (peaceful; calm; serene).
agitated, turbulent — each the opposite of tranquil (peaceful; calm; serene).
Yes. tranquil is on the SAT Prep Easy list — mid-frequency academic words that do get tested. 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.
tranqu（quiet, Latin）+ il→ peaceful, serene.