pertinacity

noun
🔊/ˌpɜːtɪˈnæsəti/
🔊/ˌpɜːrtnˈæsəti/
[uncountable] (formal)
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  1. the quality of being determined to achieve a particular aim despite difficulties or opposition坚定不移的;坚决的;义无反顾的
    • With his usual pertinacity, he pursued this new line of enquiry.像往常一样,他追求这条新的询问线。
    Topics Successc2