肾用英语可以称作 "kidney". 来源是希腊语，最初用于描述象牙般的白色种子，后来用于描述这种形状相似的器官。一些例句包括：

The kidneys are part of the urinary system.

肾是泌尿系统的一部分。

He has been suffering from kidney failure for several years.

他多年来一直患有肾衰竭。

I need to drink more water to help my kidneys function properly.

我需要多喝水，以帮助我的肾脏正常工作。