nonstarter /nɒnˈstɑːtə/

also non-starter

• 1. 

  N-COUNT If you describe a plan or idea as a nonstarter, you mean that it has no chance of success. 无成功机会的事情 [非正式]

  例：

  The United States is certain to reject the proposal as a nonstarter.

  美国肯定会以无望成功为由否决这项提案。