wall/wɔːl/
n.1. 墙；墙壁；围墙There was a wall around the park.公园四周有围墙。
We have painted all the walls white.我们把所有的墙壁都漆成了白色。
2. 房间内墙Hang the picture on the wall.把画挂在墙上。
3. 类似墙的东西a wall of water挡水墙，坝
4. 障碍a wall of silence彼此无言（隔着一堵墙）
5. （管子等）空心物的内壁the walls of blood vessel血管内壁