bailey
/ˈbeɪlɪ/noun
(pl. -eys)
1- the outer wall of a castle（城堡的）郭。
1.1
- a court enclosed by this（城堡与外廓之间的）堡场。参见MOTTE-AND-BAILEY.
词源
Middle English: probably from Old French baile 'palisade， enclosure' （see BAIL2）.