guar·an·tee¹/ˏgærən`ti; ˌɡærənˈtiː/ v [T] 1 to promise that something will happen or be done 保证,担保: We guarantee delivery within 48 hours. 我们保证 48 小时内送达。 + (that) Can you guarantee that it will arrive tomorrow? 你能保证明天送到吗? guarantee to do sth We guarantee to refund your money if you are not satisfied. 如果你不满意,我们保证退款。 2 to give a written promise to repair or replace a product that has a fault 保用〔商品〕,保修