"extremely protracted" is a correct and usable phrase in written English.
You could use it to describe a situation, process, or task that takes an unusually long amount of time. For example, "The negotiations were extremely protracted and lasted for several days."
One of them is to make that absence extremely protracted and to end it with something extraordinary.
"We believe there is an important balance between relief to residents and the cost of extremely protracted litigation and trial," she told the court.
He now concluded that his seemingly senseless, extremely protracted efforts to align his sentences on the right side of Microsoft Word were in fact generating unusual syntactical constructions and strange word choices.
Polar bear walrus battles are often extremely protracted and exhausting, and bears have been known to forgo the attack after injuring a walrus.
The deviation of decays was extremely protracted for Cy3-I (severe mutants), being significantly different 50 s after the final stimulus (Fig. 5B).
Furthermore, the requirement to wait up to 28 days for a second CDI case to occur before a PII could be declared made the overall 'testing period' extremely protracted.
That is why all the detailed analysis of what Brexit would entail comes to the conclusion that divorce negotiations would be extremely difficult, very protracted, terrifically tortuous and not positive for the British economy.
Gene Siskel gave the film a negative review, describing Aliens as "one extremely violent, protracted attack on the senses" and that "toward the end, the film resorts to placing a young girl in jeopardy in a pathetic attempt to pander to who knows what audience.
He warned, though, that the denouement could be protracted and extremely bloody, costing tens, or even hundreds of thousands of Syrian lives.
He told MPs: "The alternative to any payments made would have been protracted and extremely expensive litigation in an uncertain legal environment in which the government could not be certain that it would be able to defend departments and the security and intelligence agencies without compromising national security.
"The alternative to any payments made would have been protracted and extremely expensive litigation in an uncertain legal environment in which the government could not be certain that it would be able to defend Departments and the Security and Intelligence Agencies without compromising national security.
