obstacle

The biggest obstacle, however, to a spectacular night of meteor gazing is cloud.

Senior Hamas official Fawzi Barhoum said the group's negotiators were working to remove "all obstacles to an agreement that meets the aspirations of our people".

Wind belt countries like the UK face tougher obstacles, however.

One obstacle is that designers haven’t been able to replicate the very crucial human sense of touch or operate with human-like dexterity.

“But there are too many obstacles and this will have ramifications for the cost and quality of healthcare.”