Used and loved by millions
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
warn about
Grammar usage guide and real-world examplesUSAGE SUMMARY
"warn about" is correct and usable in written English.
You can use it when you want to advise someone about something that could cause them difficulty or harm. For example: John warned us about the icy roads ahead.
✓ Grammatically correct
News & Media
Science
Alternative expressions(20)
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
58 human-written examples
Didn't someone warn about that?
News & Media
Parents who warn about regrets.
News & Media
Industry and employers constantly warn about this.
News & Media
Still, scientists warn about drawing conclusions about humans.
News & Media
whom you once pulled aside to warn about fraud?
News & Media
Corporations continued to warn about weakening earnings yesterday.
News & Media
Environmentalists warn about Mr. Bush's record in Texas.
News & Media
Commentators warn about the risks of shaming and censorship.
News & Media
Conservative Catholic Web sites warn about "Catholicism lite".
News & Media
Then John Major went on the radio to warn about the perils of independence.
News & Media
Speeches warn about the rise of the Far Right throughout Eastern Europe.
News & Media
Expert writing Tips
Best practice
When using "warn about", ensure the subject clearly understands the potential negative consequences you are highlighting.
Common error
In formal writing, consider more precise alternatives like "caution against" or "alert to" for a more sophisticated tone.
Source & Trust
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "warn about" functions as a verb phrase, specifically a transitive phrasal verb. It requires an object, indicating what or whom is being cautioned. Ludwig AI validates that the phrase is correct and usable. It is used to alert someone to a potential danger or negative consequence.
Frequent in
News & Media
60%
Science
20%
Formal & Business
10%
Less common in
Wiki
5%
Encyclopedias
3%
Academia
2%
Ludwig's WRAP-UP
In summary, "warn about" is a versatile and frequently used phrasal verb that effectively conveys caution or advice regarding potential dangers or negative outcomes. Ludwig AI confirms its grammatical correctness and usability across various contexts. While appropriate for general use, consider more formal alternatives like "caution against" in certain writing scenarios. Predominantly found in news and media, "warn about" serves the crucial function of alerting individuals to risks, promoting informed decision-making. Understanding its nuances ensures clear and impactful communication.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
sound the alarm
Implies a strong and urgent warning about a serious threat.
forewarn of
Stresses the act of warning in advance.
caution against
Emphasizes advising against a particular action due to potential risks.
flag up
Emphasizes bringing attention to a specific issue or concern.
remind of the risks
Focuses on reminding someone of the potential dangers that already exist.
alert to
Focuses on making someone aware of a potential danger or problem.
highlight the dangers of
Focuses on emphasizing the potential risks involved.
advise of
A more formal way to inform someone about potential issues.
call attention to
A more general way of bringing something to someone's awareness, often a potential problem.
put on notice
Indicates a formal warning or notification.
FAQs
How can I use "warn about" in a sentence?
You can use "warn about" to advise someone of a potential danger or negative consequence. For example: "The weather forecast "warned about" heavy snow", or "Experts "warn about" the risks of social media addiction".
What are some alternatives to "warn about"?
Depending on the context, you can use alternatives like "caution against", "alert to", or "forewarn of".
Is it better to say "warn about" or "warn of"?
"Warn about" is generally used to indicate the subject of the warning, while "warn of" indicates the thing that is being warned. Both are correct, but the choice depends on the specific context.
When is it appropriate to use "sound the alarm" instead of "warn about"?
"Sound the alarm" is appropriate when you want to express a sense of urgency or immediate danger, while "warn about" is a more general caution. For instance, you might "sound the alarm" about an imminent threat, whereas you would "warn about" the long-term effects of poor diet.
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Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested