Noun > Obstacle
(count)
1 : something that makes it difficult to do something
He overcame the obstacles of poverty and neglect.
They must overcome a number of obstacles before the restaurant can be opened.
Lack of experience is a major obstacle for her opponent.
an obstacle to learning/progress
2 : an object that you have to go around or over : something that blocks your path
She swerved to avoid an obstacle in the road.