pertinacityn.
英 ,pɜːtɪ'næsɪtɪ | 美 ,pɝtn'æsəti
中文n. 顽固；执拗
词根词源
pertinacity (n.)c. 1500, from Middle French pertinacité (early 15c.), from Old French pertinace "obstinate, stubborn," from Latin pertinacem (nominative pertinax) "very firm, tenacious, steadfast, persevering," from per- "very" (see per) + tenax (see tenacious). It drove out earlier pertinacy (late 14c.).
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