墙壁在英语中是可以有复数的。可以用 walls 来表示墙壁的复数形式。

来源:

墙壁的英文单词 wall 来源于古英语 wæll,最初指的是围墙、城墙或防御工事,后来扩展到指围绕房屋、建筑物或其他建筑物的围墙。

例句:

The walls of the castle were thick and strong, designed to keep out invaders. (城堡的墙壁厚实而坚固,旨在防止入侵者。)
The house had a white picket fence around it and a beautiful garden with flowers growing up the walls. (这座房子周围有一道白色小木护栏,还有一座美丽的花园,墙上爬着花儿。)
I leaned against the wall and closed my eyes, trying to gather my thoughts. (我靠在墙上闭上眼睛,试图整理一下思路。)