1The pertinacious journalist refused to drop the investigation, even when her sources began to dry up.
2Is it admirable to be pertinacious in one's pursuit of justice, or does such single-mindedness risk overlooking alternative perspectives?
3The team's pertinacious defense ultimately paid off, as they managed to hold their opponents to a scoreless tie.
4Critics argue that the pertinacious focus on economic growth has come at the expense of environmental sustainability.
5There is something to be said for the pertinacious spirit of entrepreneurs who, despite repeated failures, continue to innovate and adapt.