Synonyms of warn

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

• alert
• advise
• inform
• forewarn
• caution
• wake
• predict
• notify
• admonish
• forecast
• foretell
• apprise
• presage
• prophesy
• prognosticate
• tip (off)
• augur
• foreshadow
• portend
• harbinger
• bode
• forbode
• forebode
• foretoken

Antonyms & Near Antonyms

• risk
• imperil

Example Sentences

Recent Examples of warn

Some companies that have invested billions to boost U.S. manufacturing and build goodwill with Trump have pushed back on the tariffs, warning about their potential impact on research and development in the industry and patients. —Annika Kim Constantino, CNBC, 9 Apr. 2025

If enacted, these reforms could cut off access to affordable payments for millions of borrowers, eliminate student loan forgiveness, and trap people in a lifetime of debt, warn advocates. —Adam S. Minsky, Forbes.com, 9 Apr. 2025

In a statement, the society warned that cuts to scientific agencies could undermine public safety and weather preparedness nationwide. —Darrell Smith, Sacbee.com, 9 Apr. 2025

Economists warn that the bolívar’s slide could signal a return to hyperinflation — a specter that devastated the country’s economy in recent years. —Antonio Maria Delgado, Miami Herald, 9 Apr. 2025