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]
(..) No, Hertz keeps its vehicles too long. If a car has over miles, I won't drive it. Maestro doesn't instant checkout. I like to park and go. Hertz doesn't guarantee navigation. It's funny. You don't seem like a girl who needs directions. I hate asking for directions. That's why I get a nav. (..)2009 Up in the Air