Her ingenuous questions about the mechanics of photosynthesis revealed a refreshing curiosity that encouraged the professor to explain the process more thoroughly.
她关于光合作用机制的天真问题展现出令人耳目一新的好奇心，促使教授更详尽地解释这一过程。
Which choice best defines “ingenuous”?
D — Innocent and frank; naive.. “ingenuous” means Innocent and frank; naive..
Which word means “Innocent and frank; naive.”?
A — ingenuous. “ingenuous” means Innocent and frank; naive..
ingenuous — Innocent and frank; naive.. In Chinese: 天真的；坦率的.
ingenuous is pronounced //ɪnˈdʒɛnjuəs//.
Her ingenuous questions about the mechanics of photosynthesis revealed a refreshing curiosity that encouraged the professor to explain the process more thoroughly. (她关于光合作用机制的天真问题展现出令人耳目一新的好奇心，促使教授更详尽地解释这一过程。)
naive, frank, artless — all close in meaning to ingenuous (Innocent and frank; naive.).
crafty, sophisticated — each the opposite of ingenuous (Innocent and frank; naive.).
Yes. ingenuous 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.
in- + genu(生) → 天生纯真。