bollard
/ˈbɒləd/noun
1
- Brit. a short post used to prevent traffic from entering an area or using part of a road〈英〉（行人安全岛的）护柱。
2
- a short, thick post on the deck of a ship or a quayside, to which a ship's rope may be secured（码头或船上的）系缆桩, 系船柱。
词源
Middle English (in sense 2)： perhaps from Old Norse bolr （see BOLE1 ） + -ARD.