clinching

I hear he finally clinched the deal to buy the land he wanted.

我听说他最终做成了这笔交易，买到了他想要的地。

When they said the job would involve travelling to Paris, that clinched it (for her) (= that made her certain that she wanted the job).

他们说这份工作有机会去巴黎，她便决心接受这份工作。