人行道用英语说 sidewalk。

它的来源是由两个英文单词组合而来，人行(walk)道(road)。

下面是一些英文例句和中文翻译：

The sidewalk was crowded with people. 人行道上挤满了人。

She tripped and fell on the sidewalk. 她在人行道上跌倒了。

The city is planning to widen the sidewalk. 这座城市正在计划拓宽人行道。