warning
[ˈwɔ:rnɪŋ]
n.
警告;
征候，预兆;
前车之鉴;
adj.
警告的;
告诫的;
引以为戒的;
v.
警告( warn的现在分词);
提醒;
告诫;
预先通知;
例句:
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Without warning, Bardo smacked his fist into his open hand.
巴多没有任何预兆地一拳砸在自己摊开的手掌上.
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The driver managed to escape from the vehicle and shout a warning.
那名司机设法从车里逃了出来并大声警告别人。
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I had this uncanny feeling that Alice was warning me.
我有一种奇怪的感觉：艾丽斯是在警告我。
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There had been no warning, and no consultation.
来自BBC
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It is an ominous warning of what may follow.
来自BBC
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Wait, why is this a warning to employers?
来自WSJ