kidney
/ˈkɪdnɪ/noun
(pl. -eys)
1- each of a pair of organs in the abdominal cavity of mammals, birds, and reptiles, excreting urine肾, 肾脏。
1.1
- mass noun the kidney of a sheep, ox, or pig as food（可食的猪、牛或羊的）腰子。
1.2
- mass noun temperament, nature, or kind个性, 脾气; 类型：
I hoped that he would not prove of similar kidney.
我希望他最终将证实不是同一类型的人。
The kidneys' main function is to purify the blood by removing nitrogenous waste products and excreting them in the urine. They also control the fluid and ion levels in the body, by excreting any excesses. The kidneys were anciently thought to control disposition and temperament.
词源
Middle English: of obscure origin.