Privacy concerns are one of the thorniest obstacles.
The status of Jerusalem is one of the thorniest obstacles to forging a peace deal between Israel and the Palestinians, who want East Jerusalem as their capital.
And it faces potentially thorny regulatory obstacles.
That is because the recent good news has cleared away thorny legal obstacles that made BMS hard to value properly for any potential bidder.
And like many of our over 600 co-participants in this year's competition, we saw that the professional coaching and expert feedback could also help us to overcome the obstacles along the thorny way from a useful idea to a running business.
She picked her way down treacherous trails full of obstacles — downed trees, thorny branches, muddy holes.
Why can't we make a deal?" says Knox. Swapping kidneys and other organs is something that has been fantasized about for years, only to be deterred by scientific obstacles, as well as thorny legal and ethical concerns.
But the thorny issue of fishing quotas was seen as a key obstacle to joining the bloc, although it was never brought up in the accession talks.
Another contestant managed "stylopharyngeus" but stumbled over the short but thorny "boyg," a Norwegian borrowing that means "a formless or pervasive obstacle, problem, or enemy".
Yet the generals' persistent meddling in politics and the red lines they seem to draw around some of the thorniest subjects—such as Cyprus or the Kurds are among the biggest obstacles to Turkey becoming a full democracy.
It has persuaded me that the obstacles to engaging Americans in the needed responses to global warming are, without question, thorny and vast.
