"formidable difficulties" is a correct and usable phrase in written English.
It means challenges or obstacles that are very difficult or intimidating. Example: Despite facing formidable difficulties, the team was able to overcome them and win the championship.
Formidable difficulties faced the new king early in his reign.
Even when the rules specifying the configuration are relatively simple, enumeration may sometimes present formidable difficulties.
He acknowledged that any project would face formidable difficulties: "There is no sewer system, no working power system.
Hutton is right to rub the noses of starry-eyed western governments and investors in the formidable difficulties China faces.
China also faces formidable difficulties in dealing with widespread corruption, a sclerotic political system, severe environmental damage, inefficient state-owned monopolies and other problems.
The charges would probably not be the ones that people outside Yugoslavia believe should be brought, and the protection of witnesses would present formidable difficulties.
No, it was just the formidable difficulty of a negotiation between mistrustful adversaries.
Beginning with his 1971 collection, "The Night Mirror: Poems," however, he adopted a more ambitious program, writing poetry of formidable difficulty, often in longer forms.
The time may be ripe for Stevens in Britain, where his work has never quite had the appeal of Robert Frost or TS Eliot, in part because of its eccentric diction and formidable difficulty, both of which have been overemphasised.
Even if the metaphysician were thus able to make good the negative side of his case, he would still face the formidable difficulty of establishing that there is something answering to his conception of what is ultimately real and of identifying it.
The revision surgery is usually hard to manipulate due to the formidable difficulty of repairing the critical bone defect.
