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]
(..) Not much to be gained from discussing it with you, though, is there? What better person to discuss it with? What better guarantee could you have that the things you say will never leave this room? But perhaps you're right. If she's driven you this far, (..)2017 TvShow: Game of Thrones Title: The Queen's Justice Season: 7 Episode 3