prevent/prɪ'vent/

v. stop sth from happening or stop sb from doing sth

v. [T] 阻止；防止，预防：prevent pollution 预防污染

◇[prevent sb from doing sth = prevent sb (或sb's) doing sth] Mother prevented me from going out. =Mother prevented me(或my) going out. 妈妈不让我出去。

构词pre- + vent (=come)

音组-vent/-vent/

event; invent; prevent

用法prevent 指“阻止成功”，要说“试图阻止”，须说try to prevent。类似用法的有persuade。