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]
(..) Yes. For the moment. The line's open. He will only see you. Okay, Katniss, go. President Snow? President Snow. It's Katniss. - There's no guarantee he's even watching. - President Snow? - I know, but he might be. - President Snow, I need to speak with you. Are you there? (..)2014 The Hunger Games: Mockingjay - Part 1
(..) Maybe there's someplace that's less dangerous. District . They reported heavy bombing last week. There are no military targets left. - We can't guarantee her safety. - You'll never be able to guarantee my safety. - I wanna go. - And if you're killed? Make sure you get it on camera. (..)2014 The Hunger Games: Mockingjay - Part 1