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]
(..) and then go to strip clubs now, can he? All right, what do you want? An admission of guilt and a guarantee that you'll obtain treatment before working again. And Nancy gets reinstated with back pay. Fine. (..)2011 TvShow: Suits Title: Pilot Season: 1 Episode 1
(..) a civil violation. The penalty is money. But witness tampering, that's a crime, and you will go to prison, where, I guarantee, you'll learn more about unwanted sexual advances than you can possibly imagine. (..)2011 TvShow: Suits Title: Pilot Season: 1 Episode 1