pertinacious
/ˌpɜːtɪˈneɪʃəs/adjective
- formal holding firmly to an opinion or a course of action〈正式〉坚持的, 锲而不舍的, 顽强的：
he worked with a pertinacious resistance to interruptions.
他顽强地坚持不间断地工作。
派生词
pertinaciously
adverbpertinaciousness
nounpertinacity
noun词源
early 17th cent.: from Latin pertinax, pertinac- 'holding fast' + -OUS.