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
• forebode
• foretoken

Antonyms & Near Antonyms

• risk
• imperil

Example Sentences

Recent Examples of warn

The department also warned that minors are not exempt from prosecution and said parents or guardians may be held legally or financially responsible for damage caused by their children. — Sydney Barragan, Oc Register, 9 July 2026

The woman did not know Kreuzer’s whereabouts, but warned deputies that the Rancho Cordova man was armed. — Darrell Smith, Sacbee.com, 9 July 2026

While copying the last testament of his predecessor—which warned of the dire need for a strong military—the young Dalai Lama discovered that corrupt officials were embezzling army funds. — Charlie Campbell, Time, 9 July 2026

Defense experts and strategists have described its drone campaign as pivotal in helping to stall Russia’s military momentum, while also warning that Kyiv’s deep-strike successes have drastically raised the risk of escalation. — Sam Meredith,elsa Ohlen, CNBC, 9 July 2026