stool pigeonWiktionary 原文构词拆分stale词根/词干“decoy”+pigeon词根/词干词源说明From the act of tying or even nailing a pigeon to a stool to act as a decoy by hunters. Alternatively, from an alteration of stale (“decoy”) + pigeon.释义（英文）名词 Noun(originally) A pigeon tied to a stool by a piece of twine, used as a decoy to entice free-flying birds to the ground to be shot