why does the word 'leave' mean“离开” and "留下" at the same time? First situation, one person leave the house, I know the mean like this.It is meaning the person and the house will be separated. Second situation, one person leaves, I don't sure if he is stay here or not. Because in Chinese, 离开means somebody go away and not stay somewhere, 留下means stay and not go away. But the word 'leave' means both 离开 and 留下 at the same time. I don't know if I have express the question clearly, sorry and thank you.