warn

verb

1. 提醒注意（可能发生的事）；使警惕
   to tell sb about sth, especially sth dangerous or unpleasant that is likely to happen, so that they can avoid it
   1. I tried to warn him, but he wouldn't listen.
      我设法提醒过他，可他就是不听。
   2. If you're thinking of getting a dog, be warned ─they take a lot of time and money.
      如果你想养条狗，有话说在前头，那可既费时间又费钱。
   3. He warned us against pickpockets.
      他提醒我们要提防小偷。
   4. She was warned that if she did it again she would lose her job.
      她被警告说如果她再这样做就会丢掉工作。
   5. I had been warned what to expect.
      有人事先告诉过我要出什么事。
   6. Police have warned of possible delays.
      警方已经通知可能会廷期。
2. 劝告（使有所防备）；警告；告诫
   to strongly advise sb to do or not to do sth in order to avoid danger or punishment
   1. The guidebook warns against walking alone at night.
      这本指南告诫夜间不要单独行走。
   2. He warned Billy to keep away from his daughter.
      他警告比利离他女儿远点。
3. 警告
   to give sb an official warning after they have broken a rule
   1. The referee warned him for dangerous play.
      裁判警告他有危险动作。

1. VERB 提醒;警告
   If you warn someone about something such as a possible danger or problem, you tell them about it so that they are aware of it.
   1. When I had my first baby friends warned me that children were expensive...
      当我有了第一个孩子时，朋友们提醒我说养孩子是很花钱的。
   2. They warned him of the dangers of sailing alone...
      他们警告他说独自航行危险重重。
   3. Analysts warned that Europe's most powerful economy may be facing trouble...
      分析家警告说，欧洲最强大的经济体可能将面临困境。
   4. He also warned of a possible anti-Western backlash.
      他还警告有可能会出现对西方的强烈抵制。
2. VERB 警告，告诫(不要做…)
   If you warn someone not to do something, you advise them not to do it so that they can avoid possible danger or punishment.
   1. Mrs. Blount warned me not to interfere...
      布朗特夫人警告我不要插手。
   2. Children must be warned to stay away from main roads...
      必须警告孩子们远离交通要道。
   3. 'Don't do anything yet,' he warned. 'Too risky.'...
      “暂时不要采取行动，”他警告说，“太危险。”
   4. 'Keep quiet, or they'll all come out,' they warned him...
      “别作声，否则他们全都出来了，”他们警告他。
   5. I wish I'd listened to the people who warned me against having the operation...
      我真希望自己当时听从了别人的劝告，没去做手术。
   6. Mr Lowe warned against complacency.
      洛先生告诫说不能自满。
3. CONVENTION 小心;提防
   If someone says to you 'be warned', they are advising you to be cautious, because there are risks that you may not have thought about.
   1. But be warned: this is not a cheap option.
      但要慎重：这个选择代价不菲。

1. Teachers warn today that Latin, Greek and other classics will be squeezed out of school timetables.
   老师们今天发出警告说，拉丁语、古希腊语和其他古典文学将被挤出学校的课程表。
2. I must warn you against raising your hopes.
   我必须警告你不要期望过高。
3. Lawrence kept on butting me but the referee did not warn him.
   劳伦斯不停地用头撞我，但是裁判并没有警告他。
4. One of them would keep a look-out on the road behind to warn us of approaching vehicles
   他们中会有一人看着后面的路，提醒我们注意过来的车辆。
5. Signs across the entrances warn all visitors to stub out their cigarettes.
   入口处的告示牌提醒游客们熄灭香烟。
6. When I had my first baby friends warned me that children were expensive
   当我有了第一个孩子时，朋友们提醒我说养孩子是很花钱的。
7. They warned him of the dangers of sailing alone
   他们警告他说独自航行危险重重。
8. Analysts warned that Europe's most powerful economy may be facing trouble
   分析家警告说，欧洲最强大的经济体可能将面临困境。
9. He also warned of a possible anti-Western backlash.
   他还警告有可能会出现对西方的强烈抵制。
10. Mrs. Blount warned me not to interfere
    布朗特夫人警告我不要插手。
11. Children must be warned to stay away from main roads
    必须警告孩子们远离交通要道。
12. 'Don't do anything yet,' he warned. 'Too risky.'
    “暂时不要采取行动，”他警告说，“太危险。”
13. 'Keep quiet, or they'll all come out,' they warned him
    “别作声，否则他们全都出来了，”他们警告他。
14. I wish I'd listened to the people who warned me against having the operation
    我真希望自己当时听从了别人的劝告，没去做手术。
15. Mr Lowe warned against complacency.
    洛先生告诫说不能自满。
16. But be warned: this is not a cheap option.
    但要慎重：这个选择代价不菲。
17. He spends his spare time visiting schools to warn pupils off drugs.
    他用自己的业余时间访问学校，告诫小学生远离毒品。
18. But I want to warn you now that something might go wrong.
    要是砸锅了，你可别后悔呀！
19. I'll run ahead and warn them.
    我要跑在前头，警告他们。
20. If you demand his presence, warn him in advance.
    如果你要他来，就事先通知他。
21. The police have put up signs to warn people off this area.
    警方已竖起了标示牌，告诫人们不要靠近这一地区。
22. I warn you that I am armed.
    我警告你，我有武器。
23. I shouted to him to warn him of the danger.
    我对他呼喊，警告他有危险。
24. But I warn you, if anything happens to alex.
    但是我警告你，如果埃里克斯发生了什么。
25. I warn you I am beginning to lose my patience with you.
    我警告你，我对你已渐渐失去耐心了。
26. We must warn people not to do like that.
    我们必须警告人们不要再那样做了。
27. I called to warn you.
    我特地打电话来警告你。
28. David was trying to warn you and warn me.
    戴维想警告你和我。
29. In fact, I not only inform you, I also warn you to seek help.
    事实上，我不仅仅是通知你，我也是在发出警告让你寻求帮助。
30. And you tried to warn me.
    你已经试着警告我了。

  caution counsel warn【导航词义：告诫】

  caution v. 警告，告诫

〔辨析〕指针对有潜在危险、困难等的事物提出警告，含劝告某人小心行事的意味。

  counsel v. 〈正式〉劝告，建议

〔辨析〕语气较强，主要指对重要问题提出劝告、建议等。

  warn v. 警告，告诫

〔辨析〕指对确实存在的危险、麻烦等予以警告，比 caution 语气更强，尤强调后果。

warn sb off (sth)

1. （尤指以威胁的方式）叫…离开，告诫…不要靠近
   to tell sb to leave or stay away from a place or person, especially in a threatening way
   1. I tried to warn him, but he wouldn't listen.
      我设法提醒过他，可他就是不听。
   2. If you're thinking of getting a dog, be warned ─they take a lot of time and money.
      如果你想养条狗，有话说在前头，那可既费时间又费钱。
   3. He warned us against pickpockets.
      他提醒我们要提防小偷。
   4. She was warned that if she did it again she would lose her job.
      她被警告说如果她再这样做就会丢掉工作。
   5. I had been warned what to expect.
      有人事先告诉过我要出什么事。
   6. Police have warned of possible delays.
      警方已经通知可能会廷期。
2. 劝…不要做；建议…停止做
   to advise sb not to do sth or to stop doing sth
   1. The guidebook warns against walking alone at night.
      这本指南告诫夜间不要单独行走。
   2. He warned Billy to keep away from his daughter.
      他警告比利离他女儿远点。

verb

1. notify, usually in advance
   1. I warned you that I would ask some difficult questions

2. ask to go away
   1. The old man warned the children off his property

3. notify of danger, potential harm, or risk
   1. The director warned him that he might be fired
   2. The doctor warned me about the dangers of smoking

4. admonish or counsel in terms of someone's behavior
   1. I warned him not to go too far
   2. I warn you against false assumptions
   3. She warned him to be quiet

   Synonym:    discourageadmonishmonish