guarantee [guarantees](person who gives such a guarantee) noun [UK: ˌɡæ.rən.ˈtiː] [US: ˌɡe.rən.ˈtiː]
garantenoun {m}
guarantor [guarantors](person or company that provides a guarantee) noun [UK: ˌɡæ.rən.ˈtɔː(r)] [US: ˌɡe.rən.ˈtɔːr]I will be your guarantor. = Voy a ser su garante.