prevent
/prɪˈvent; prɪ`vɛnt/ v[Tn, Tn.pr, Tsg]
~ sb/sth (from doing sth) stop or hinder sb/sth 阻止或妨碍某人[某事物]
prevent the spread of a disease/a disease from spreading 防止某种疾病的蔓延
Nobody can prevent us/our getting married. 谁也阻止不了我们结婚.
Your prompt action prevented a serious accident. 你由於动作敏捷而防止了一次严重事故.