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]
(..) I can't put any of you in danger ever again. I'm sorry. "If you assume that there is no hope, then you guarantee that there will be no hope. If you assume that there is an instinct for freedom, that there are opportunities to change things, (..)2016 Captain Fantastic