Was it the difficult nature of obtaining accurate intelligence that allowed him to elude American forces, or were other factors involved?

Due to the difficult nature of the exams students are seldom awarded more than 90%.

Electricity is by its nature difficult to store and has to be available on demand.

Its presence added somehow to the elusive and difficult nature of their search.

It was abandoned in 1971 by the Belgian mission due to the expensive and difficult nature of the work needed to clear the large theatre.

Work on the building slowed in 1925 due to the difficult nature of completing the roof and raising the tower.

An employee who makes decisions of a difficult and confrontational nature would thus require job protection.

"These are the difficulties and by their difficult nature, they meant that the work will take some time."

Furthermore it highlights the difficult nature of the task which we will have to face.

Burns have a difficult nature and require close observation.