plunge pool
noun/ˈplʌndʒ puːl/
/ˈplʌndʒ puːl/
- a small deep artificial pool filled with cold water, especially one that you jump into in order to get cooler after a sauna
（尤指洗完桑拿浴后跳入的）冷水池 - a deep pool at the bottom of a waterfall
瀑布底部的深潭