The stain proved obstinate; three solvents failed before conservators found one that lifted it without harming the canvas.
这块污渍极为顽固；三种溶剂都失败后，修复师才找到一种既能去污又不伤画布的溶剂。
Which choice best defines “obstinate”?
C — Stubbornly refusing to change.. “obstinate” means Stubbornly refusing to change..
Which word means “Stubbornly refusing to change.”?
D — obstinate. “obstinate” means Stubbornly refusing to change..
obstinate — Stubbornly refusing to change.. In Chinese: 固执的；顽固的.
obstinate is pronounced //ˈɒbstɪnət//.
The stain proved obstinate; three solvents failed before conservators found one that lifted it without harming the canvas. (这块污渍极为顽固；三种溶剂都失败后，修复师才找到一种既能去污又不伤画布的溶剂。)
stubborn, headstrong, unbending — all close in meaning to obstinate (Stubbornly refusing to change.).
compliant, flexible — each the opposite of obstinate (Stubbornly refusing to change.).
Yes. obstinate 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 obstinacy → 犟。