Basis front end is called the wall foot;

基底的前端称为墙趾；

youdao

A forty-foot-high concrete wall encircles the jail.

一道40英尺高的水泥墙环绕着该监狱。

《柯林斯英汉双解大词典》

All through the night, Alia, Anis, his brothers and neighbours took the books from the library, passed them over the seven-foot wall and hid them in the restaurant.

整整一个晚上，艾丽娅、阿尼斯以及他的兄弟和邻居们，把书越过七尺高的墙从图书馆里搬出来，然后藏在饭店里。

youdao

"Finally,because of this law, the American people will never again be asked to foot the bill for Wall Street's mistakes.

VOA: special.2010.07.23

Even more impressive is that he created a sense of infinite perspective on a curved, 27-foot wall.

WSJ: Urban Gardner: Three Arts of Dioramas at the Museum of Natural History

There was a terrace on the third floor with a seven-foot wall, preventing people from seeing inside.

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He said that the 12-foot wall protecting their high-voltage wires was two feet short of the floodwaters.

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