The phrase "a long arduous process" is correct and usable in written English.
It can be used to describe a task or journey that is both lengthy and difficult, often requiring significant effort and perseverance.
Example: "The project was a long arduous process, but the results were worth the struggle."
Alternatives: "a lengthy and challenging journey" or "a protracted and difficult undertaking".
"It's been a long, arduous process," Mr. Hopson said.
The government interest in security technology has opened financing options and new markets for start-ups, but dealing with the government can still be a long, arduous process.
"This has been a long, arduous process," Kweisi Mfume, president of the National Association for the Advancement of Colored People, said as the agreements were announced.
It was a long, arduous process, and although we had to move out for several months, it was well worth the headache.
However Pawlikowski arrived at Ida – and by his telling, it was a long, arduous process of honing and tweaking – it is of a piece with his earlier films, the British-set Last Resort and My Summer of Love, and even his 40-minute BBC car-thief docu-drama Twockers.
COSEPUP should take note of experiences similar to Watkins': Implementation may be a long, arduous process.
One can see this vividly in Egypt, where the bottom-up democracy movement was strong enough to oust Mubarak but now faces the long, arduous process of building new institutions and writing a new social contract from a democracy coalition that encompass Muslim Brothers, Christian liberals, Muslim liberals, the army and ultraconservative Muslim Salafis.
The consortium's purpose is to accelerate the rate at which various drug combinations are studied and tested -- taking years off this long, arduous process.
I had been wrung through the legal system before and knew the long, arduous process I was in for.
Then, when the heavy operations crews move out, long after the telethon lines stop ringing, and after the Nightly News stops covering the tragedy, Haiti will begin the long, arduous process of Rebuilding.
There is a long, arduous, and bureaucratic process involved in getting that compensation, and it's retraumatizing.
