obstacle

A state law approved last year commissioned a study to analyze opportunities for and obstacles to increasing social housing in California.

Due to the pressure needed to push water through membranes, high energy demand is a considerable obstacle to desalination and ZLD.

Still, Liu notes, “In China, policy is one thing, practice is another. There have been a lot of obstacles.”

Certain picks have proven contentious and may face obstacles.

The shortcomings of "Dune: Prophecy" are akin to the obstacles typical of most Herbert adaptations — sprawl is the mind-killer, not fear.