The discovery of a fossil in the quarry was fortuitous, as it provided crucial evidence about the region's ancient ecosystem.
在采石场发现化石纯属偶然，却为该地区古代生态系统提供了关键证据。
Which choice best defines “fortuitous”?
C — Happening by chance; lucky.. “fortuitous” means Happening by chance; lucky..
Which word means “Happening by chance; lucky.”?
D — fortuitous. “fortuitous” means Happening by chance; lucky..
fortuitous — Happening by chance; lucky.. In Chinese: 偶然的；侥幸的.
fortuitous is pronounced //fɔːˈtjuːɪtəs//.
The discovery of a fossil in the quarry was fortuitous, as it provided crucial evidence about the region's ancient ecosystem. (在采石场发现化石纯属偶然，却为该地区古代生态系统提供了关键证据。)
coincidental, lucky, serendipitous — all close in meaning to fortuitous (Happening by chance; lucky.).
unlucky, unfortunate — each the opposite of fortuitous (Happening by chance; lucky.).
Yes. fortuitous 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.
fortu(运气) → 碰巧。