ankle

She tripped on the uneven sidewalk and severely sprained her left ankle.

(Chinese) 她在不平的人行道上绊倒了，严重扭伤了左脚踝。

The freezing water in the shallow stream only came up to the child's ankles.

(Chinese) 浅溪中冰冷的水只漫到孩子的脚踝。