major obstacleHowever, qualifications remained a major obstacle.
main obstacleSafety has been the main obstacle.
obstacle courseFood and Drink: Win the holiday obstacle course
final obstacleThere was more to this canal than just a final obstacle, however.
first obstacleThat's the first obstacle.
formidable obstacleWhen it came to assembling facts and details, the system was a formidable obstacle.
biggest obstacleCooling the water is the biggest obstacle.
last obstacleThis time tragedy struck: at the fifth last obstacle she fell and broke her neck, dying instantly.
obstacle to economicFrom the 1970s onwards, the cold war increasingly became an obstacle to economic and political stability.
become an obstacle
form an obstacleIt follows that the conditions laid down for the registration of vessels must not form an obstacle to freedom of establishment within the meaning of articles 52 et seq.
only obstacleThe only obstacle was Watkin the dung-collector whose own ample wife also had her eye on the role.