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Warn against Meaning in English

expression

ˈwɔɹn/ /əˈɡeɪnst/, /əˈɡɛnst
WAWRN uh-GAYNST, uh-GENST
wˈɔːn/ /ɐɡˈɛnst
WAWN uh-GENST

Definition

To advise someone not to do something because it may be dangerous, harmful, or a bad idea.

Usage & Nuances

'Warn against' is often used in formal or neutral situations, especially about risks, dangers, or negative consequences. Common patterns: 'warn against doing something' (using the -ing form); do not say 'warn to do something'. Frequently used by authorities, experts, or in official advice.

Example Sentences

Doctors warn against eating too much sugar.

basic

The sign warns against swimming in the river.

basic

Parents often warn against talking to strangers.

basic

Experts warn against making hasty decisions when you're upset.

natural

My teacher warned against copying homework from friends.

natural

Many reports warn against trusting online advertisements.

natural