insure vt. 给……保险 v. 确保

例句：Wesley's talent and dedication will insure his success.

卫斯理的才气和执著将确保他成功。

insurance n．保险．保险单，保险业，保险费

例句：Did you claim on the insurance after your car accident?

出了车祸后，你向保险公司要求赔偿了吗？

assure vt. 断然地说，保证，担保

例句：I can assure you that your son will be here.

我可以向你保证，你儿子在这里会很快乐的。

assurance n. 确信，断言，保证，担保

例句：Sam gave me an assurance that it would be ready by Friday.

萨姆向我保证星期五一定准备好。

ensure vt. 保证，担保，使安全，保证得到 v．确保．确保，保证

例句：If you want to ensure that you catch the plane, take a taxi.

你要想确保能赶上那班飞机，就坐出租车去吧。

ensue vi. 跟着发生，继起

例句：Many troubles ensued from this misunderstanding.

由此误会产生了许多麻烦。

guarantee n. 保证，保证书，担保，抵押品 vt. 保证，担保

例句：We cannot guarantee the punctual arrival of trains in fogy weather.

雾天我们不能保证火车准时到达。

warrant n．授权，正当理由，证明，批准 vt. 保证，批准，使有正当理由

例句：The storekeeper warranted the goods as of the first quality at the lowest price.

店主保证货物品质第一，价格最低。