WARN Synonyms: 26 Similar and Opposite Words

warn

verb

ˈwȯrn

as in to alert

to give notice to beforehand especially of danger or risk the lifeguard warned the boys that if they continued playing so rough, someone was sure to get hurt

Synonyms & Similar Words

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Antonyms & Near Antonyms

risk
imperil

Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.

Recent Examples of warn The superb ensemble includes Lyudmilla Ignatenko (Jessie Buckley) as the wife of a firefighter mortally wounded in the initial hours of the disaster and the fictional Ulana Khomyuk (Emily Watson) as a scientist who warns political leaders about the consequences of inaction. —

David Faris, TheWeek, 14 May 2026 This is not the first time scientists have warned that the tournament is at risk of extreme heat. —

Adam Kovac, Scientific American, 14 May 2026 The Russian attack was still ongoing as of Thursday morning, the air force warned. —

David Brennan, ABC News, 14 May 2026 The Metropolitan Transportation Authority has warned that the entire LIRR would be shut down, with limited shuttle bus services. —

Amethyst Martinez, USA Today, 14 May 2026 See All Example Sentences for warn

Recent Examples of Synonyms for warn

Verb

Turn on multi-factor authentication, enable every account alert your plan offers and ask your employer or plan administrator what happens after an address, phone number or bank account change.

— Kurt Knutsson, FOXNews.com, 17 May 2026
By the time health authorities were first alerted to the outbreak via social media on May 5, 50 deaths had already been recorded, the Africa CDC said.

— Chinedu Asadu, Los Angeles Times, 17 May 2026