to promise to do sth; to promise that sth will happen 保证；担保；保障◆We guarantee to deliver your goods within a week. 我们保证在一周内向你交付货物。
to give a written promise to replace or repair a product free if it goes wrong 给予书面保证；提供保修单◆The toaster is guaranteed for a year against faulty workmanship. 这种烤麪包机若存在工艺缺陷可保修一年。
(; ) to agree to be legally responsible for sth or for doing sth such as paying back a loan 承诺对…负法律责任；为…作保◆The loan will be guaranteed by the German government. 这笔贷款将由德国政府作保。◆to guarantee to pay somebody's debts 为某人的债务作保