decoy
noun [ C ] uk/ˈdiː.kɔɪ/ us/ˈdiː.kɔɪ/
诱饵，圈套;用作诱饵的人
something or someone used to trick or confuse other people or animals into doing something, especially something dangerous
They used a girl hitch-hiker as the decoy to get him to stop. 他们用一名搭便车的女孩儿作诱饵让他停车。