This is the 7206th most frequent French word.
mur
Wall.
Here, 'mur' is used to refer to a physical wall in a building context.
Le peintre a décoré le mur avec des motifs colorés.
The painter decorated the wall with colorful patterns.
In this sentence, 'mur' is used metaphorically to represent an obstacle or barrier in achieving something.
Ils ont gravi un mur de difficultés pour atteindre leur objectif.
They overcame a wall of difficulties to reach their goal.
Here, 'mur' designates the wall of a room, again indicating a physical structure.