warn (B1)

verb

Pronunciation: /wɔːn/

Definition

To tell someone about possible danger or a problem, or to advise someone to be careful.

Examples

• The weather forecast warned of heavy rain and strong winds.

• He was warned not to go near the edge of the cliff.

• The doctor warned her about the side effects of the medication.

How to Use warn

warn about (prepositional phrase)

To inform someone of a potential problem or danger. — "The teacher warned the students about the upcoming exam."

warn against (prepositional phrase)

To advise someone not to do something. — "He warned his friend against making a hasty decision."

warn that (collocation)

To inform someone that a particular situation is likely to happen. — "The report warned that the economy could collapse."

Synonyms of warn

Words with a similar meaning to warn:

• caution
• advise
• forewarn
• apprise

Antonyms of warn

Words with the opposite meaning to warn:

• encourage
• reassure

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