pertinacious pur-tn-AY-shuhs adjective WS #31

holding firmly to an opinion or a course of action; stubbornly persistent; determined and unwavering in pursuit of a goal

1. The pertinacious researcher spent decades studying the rare disease until she finally found a cure.
2. His pertinacious pursuit of justice led him to appeal the case all the way to the Supreme Court.
3. Her pertinacious efforts to preserve the historic building eventually convinced the city council to block demolition.
4. The pertinacious student refused to give up on the difficult math problem until she solved it correctly.
5. Despite numerous rejections, the pertinacious author continued submitting her manuscript to publishers.