A seat usually without back or arms.

凳子(无靠背、有靠手等)。

A bench for the feet, or for the knees in kneeling.

搁脚凳；跪凳。

The seat used in emptying the bowels; also, an emptying of the bowels, or the matter discharged.

坐式便器；马桶；粪便。

To act as stool pigeon.

【美】密告。