plug

/pləg/

blockage consisting of an object designed to fill a hole tightly

中文释义：塞子；插头

He pulled the plug out of the sink to let the water drain away.

他把水池的塞子拔掉，让水流走。

Make sure the plug is inserted firmly into the socket before turning on the device.

在打开设备前，确保插头牢固插入插座。