The phrase "remains tenacious" is correct and usable in written English.
You can use it to describe something that is persistent and resilient in spite of difficulty or opposition. For example, "After months of struggling, her tenacity remains strong; she refuses to give up on her dream."
But the love of the neo-Nazis remains tenacious.
The investigation of these results shows that low levels of fluorocarbon contaminants readily react with the alloy surface and deposit a fluorine containing carbonaceous layer, which dramatically interferes with the adhesion of the plasma polymer to the alloys, but the adhesion with primer coatings remains tenacious.
Organizations like WISE endure because the original vision is never lost, and the leadership remains tenacious.
Just as there remains some tenacious and occasionally flippant denial about climate change itself.
"Andrew Jackson and His Indian Wars" is ample proof that Robert V. Remini, a professor emeritus of history and the humanities at the University of Illinois, Chicago, remains as tenacious a champion as any president could ever hope to have.
Maternal mortality remains a tenacious problem in Indonesia despite concerted efforts by government and non-government sectors.
No longer an MP, fearless and tenacious Tam remains one of my political heroes, though I thought he was wrong about many things, including the Belgrano: she may have been steaming away from the war zone, but she was still an enemy warship threatening British lives.
As much "for the people" as "for big business" (and despite the former being under threat) the magnetism of the industry remains unquestioned, promising those tenacious and lucky enough to gain access all the kudos and job-satisfaction they could hope for.
One private passenger carrier that remains is Spring Airlines, a tenacious startup run by a founder so frugal that he shares a 100-square-foot office with his chief executive and takes the subway to business meetings.
But in the early 70s, he was among those who came back to the States and got caught up in an organization that remains one of America's most tenacious and peculiar political cults: the one lead by Lyndon LaRouche.
He has, he says, a "tenacious" grip on a story and remains determined to tell this one.
