井盖在英语中可以称为 "manhole cover"。来源于"manhole"，意为"人孔"，即用于人员进出的地下通道口。井盖是用来盖住人孔的铸铁板或塑料板。

例句：

The city workers lifted the heavy manhole cover to clean the sewer. (工人们抬起重的井盖清理下水道。)

Be careful not to trip over the manhole cover on the sidewalk. (小心踩到人行道上的井盖。)