更多意思 

n.1.  警卫员,看守
2.  警戒,保护
3.  禁军,禁卫军
4.  保护器,防护装置
5.  列车长
6.  防御姿势
vt.1.  警卫,守卫,保卫
2.  看守,监视
                                    参考例句 

| 1. |  He bribed his way past the guard and escaped. | 
 | 他买通看守而逃之夭夭了。
 | 
| 2. |  He had apparently escaped by bribing a guard  . | 
 | 他看来是贿赂了守卫而逃跑的。
 | 
| 3. |  A security guard was killed in the bank raid. | 
 | 这次银行劫案中有一名保安员遇害。
 | 
| 4. |  When you enter the building you must show the guard your pass. | 
 | 进入大楼时须向警卫出示通行证。
 | 
| 5. |  The guard was killed with a high-powered rifle. | 
 | 那卫兵被杀伤力大的火枪击毙了。
 | 
 
                                    常用词组 

    guard against...   预防, 防止, 提防
off one's guard   不警惕, 没提防
on one's guard   1) 警惕, 提防 2) 站岗,放哨,值班 3) 保持警惕