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obstinate \ ˈäb-stə-nət \ adjective and verb

adjective: tenaciously unwilling or marked by tenacious unwillingness to yield adjective: stubbornly persistent in wrongdoing adjective: resistant to guidance or discipline verb: persist stubbornly

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The word obstinate has appeared in 30 articles on nytimes.com in the past year, including on Aug. 31 in “China Sets Date for Major Communist Party Reshuffle” by Javier C. Hernández: