名詞 warning:

1. a message informing of danger
2. cautionary advice about something imminent (especially imminent danger)
   同義詞：admonition, monition, word of advice

動(dòng)詞 warn:

1. notify of danger, potential harm, or risk
   同義詞：warn
2. admonish or counsel in terms of someone's behavior
   同義詞：warn, discourage, admonish, monish
3. ask to go away
   同義詞：warn
4. notify, usually in advance
   同義詞：warn

形容詞 warning:

1. serving to warn
   同義詞：admonitory, cautionary, exemplary, monitory

1. No one has given out a warning of the imminent danger.
   沒有人對(duì)即將發(fā)生的危險(xiǎn)發(fā)出警告。
2. The police are warning (motorists) of possible delays.
   警方通知(駕駛汽車的人)交通可能受阻。
3. Even as he shouted the warning the car skidded.
   就在他高喊注意的時(shí)候，汽車滑動(dòng)了。
4. The sirens sounded an air-raid warning.
   汽笛響起了空襲警報(bào)。
5. They attacked without a warning.
   他們不宣而戰(zhàn)。

warn.ing

n.（名詞）
An intimation, a threat, or a sign of impending danger or evil.
預(yù)兆：即將到來的危險(xiǎn)或邪惡的恐嚇、威脅或跡象

Advice to beware.
警言：提醒注意的建議
Counsel to desist from a specified undesirable course of action.
告誡：使結(jié)束某項(xiàng)特定的不受歡迎的行為的勸告
A cautionary or deterrent example.
警告或前車之鑒
Something, such as a signal, that warns.See Synonyms at alarm
警報(bào)：能起警告作用之物或事，如信號(hào)參見 alarm
adj.（形容詞）
Acting or serving to warn:
作出警告的：
例句：
a warning light; warning words.
警燈；告誡之言

【引伸】
warn.ingly
adv.（副詞）