(かべ)

かべ
noun
wall
building
1. wall
A vertical structure that encloses or divides an area.
To hang a picture on the wall.
I painted the wall white.
The wall between our room and the next is thin, so I can hear voices.
2. barrier, obstacle
Figuratively, something that blocks progress.
There is a language barrier.
Figurative usage
Even when I hit a wall, I won't give up.
I want to overcome the age barrier and take on new challenges.

(かべ) refers to a wall or partition in a building, and is widely used figuratively for barriers and obstacles.

Literal collocations

Figurative collocations

The figurative sense is extremely common in everyday Japanese, often paired with ()える or (やぶ) to express overcoming challenges.