ensure [ensured, ensuring, ensures](make sure or certain) verb [UK: ɪn.ˈʃʊə(r)] [US: en.ˈʃʊr]This treaty ensures peace. = Este tratado garantiza la paz.
guarantee [guaranteed, guaranteeing, guarantees](to give an assurance that something will be done right) verb [UK: ˌɡæ.rən.ˈtiː] [US: ˌɡe.rən.ˈtiː]I guarantee it. = Lo garantizo.
warrant [warranted, warranting, warrants](to guarantee) verb [UK: ˈwɒ.rənt] [US: ˈwɔː.rənt]Her work in school warranted her good grades. = Su trabajo en la escuela garantizó sus buenas notas.