The phrase "working arduously" is correct and usable in written English.
You can use it to describe someone who is putting in a lot of hard work and effort into a task. For example, "She was working arduously on her project late into the night."
The Rev. Alejandro Solalinde, the priest who runs the Ixtepec shelter, has worked arduously to reduce abuses.
He worked arduously in the garden and woodlands, becoming in the 1930s something of an authority on horticulture, especially on the growing of roses.
Heisman, then 65 and eight years removed from his last coaching job, had worked arduously in his position of athletic director and supervisor of physical facilities at the Downtown Athletic Club.
Mr. Foxman said on Friday, "Mr. Galliano has worked arduously in changing his worldview and dedicated a significant amount of time to researching, reading and learning about the evils of anti-Semitism and bigotry".
Williams, who had worked arduously to recover from a severely broken right leg, left the Champion Center practice facility for the hospital without making a comment and he did not return phone calls.
However, one essential difference that separates this novella from the genre is that it never feigns to be a reality and clearly states in the preface to be a complete fantasy intended to soothe the mind, whereas most science fiction works arduously strive to be an extension of our reality.
In a city that has suffered some serious hardships throughout the course of the 20th century and has worked arduously to revitalize itself in the past couple of decades, the ability to have all those things abounds.
She has worked arduously every day of her life and has shown me, through her own example, that hard work and dedication will always pay off irrespective of gender.
"You'd better believe we're working on it arduously night and day," he said.
Carter means Ukraine where the Russians are arduously working out the borders that were hastily drawn when the CIS was created in the aftermath of the fall of the Soviet Union.
