混凝土的英文是 concrete。这个词来源于拉丁语 concretus，意思是固化的、凝结的。混凝土是一种建筑材料，由水泥、骨料和砂石混合制成。

例句：

The bridge is made of concrete.

We need to pour the concrete into the mold before it sets.

The concrete walls of the building provide excellent insulation.