The software comes with a 'money-back guarantee'. [=a promise that the money you spend on a product will be returned if the product is not good enough]
We used our house as a 'guarantee' for the loan. [=we said that the bank could take our house if we did not pay back the loan]
There is no 'guarantee' that they will approve the contract. [=there is no way to be sure that they will approve it]
(..) Oh, come on(!) What are the chances of that?! Wait until you get the ballistics report. The bullet in his brain wasn't fired from his gun, I guarantee it. If his door was locked from the inside, how did the killer get in? Good, you're finally asking the right questions. He's left trying to sort of (..)2010 TvShow: Sherlock Title: The Blind Banker Season: 1 Episode 2