obstacle
US /ˈɑːb.stə.kəl/
UK /ˈɑːb.stə.kəl/
1.
a thing that blocks one's way or prevents or hinders progress
:
•
The fallen tree was an obstacle in our path.
•
Lack of funding is a major obstacle to the project's completion.
a thing that blocks one's way or prevents or hinders progress