The phrase "arduous fight" is correct and usable in written English.
It can be used to describe a difficult or challenging struggle, whether physical, emotional, or metaphorical.
Example: "The team faced an arduous fight against the odds, but their determination kept them going."
Alternatives: "difficult battle" or "challenging struggle".
"It has been a long, arduous fight".
However, rather than continue an arduous fight, we have decided to put this matter behind us and concentrate on managing our business".
The most arduous fight was the one with Sean Bean, on the ladder over the giant radio telescope at the end.
In a statement the hedge fund boss called the decision "unjust and inconsistent" and said the company had paid the fine rather than continue the "arduous fight".
After collapsing in the dressing room following a particularly arduous fight, he has open-heart surgery that leaves the biggest wound of his career and he's told never to go into the ring again.
After a long and arduous fight for justice in her world, Tris ends up sacrificing herself for what she believes to be the right reason: to save everyone she loves.
This arduous fight--led by hundreds of thousands of union activists who marched, fasted, lost their jobs and even, in some cases, their lives won workers the now-standard eight-hour day.
Winning over the crowd is no small ahievement, as the dancers have had to fight an arduous battle against the strong stigmas Haitian society has assigned to youth from Cité Soleil.
The West Pier Trust, which owns the pier and has fought a long, arduous battle to save it, has been looking for a way to regenerate the area and says the i360 can bring a transformation from forlorn and ghostly to elegant and exciting.
Booker told protesters he agreed with the attorneys and predicted a "long, arduous and tough fight" over the executive order.
Still, the book shows just how arduous the climate fight has been — and will likely continue to be — for years, if not generations, to come.
