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
be warned
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "be warned" is correct and commonly used in written English.
It is typically used as a warning or caution to someone, and can be used in various contexts, such as giving advice or expressing concern. Here is an example: Be warned: hiking on this trail can be dangerous, especially in rainy weather. In this sentence, "be warned" is used at the beginning as a warning to the reader about the potential dangers of hiking on the trail. It is a concise and direct way to get the message across.
✓ Grammatically correct
News & Media
Wiki
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
60 human-written examples
But be warned.
News & Media
(Trenton fans be warned).
News & Media
Political hopefuls, be warned!
News & Media
(Be warned: spoilers ahead).
News & Media
He may! Be warned!
News & Media
Be warned: there are hills.
News & Media
Be wary and be warned.
News & Media
Russian literature purists, be warned.
News & Media
Be warned, it's quite loud.
News & Media
Be warned: the pressure can be maddening.
News & Media
Be warned, though: living conditions are basic.
News & Media
Expert writing Tips
Best practice
When employing "be warned", ensure that the context provides actionable information. The warning is most effective when the audience knows what to avoid or how to mitigate the risk.
Common error
Avoid using "be warned" without providing specific details or actionable advice. Overusing the phrase can diminish its impact and make your writing seem alarmist without substance.
Source & Trust
81%
Authority and reliability
4.6/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "be warned" functions primarily as an imperative, issuing a command or instruction. Specifically, it serves as a warning signal, alerting the recipient to potential danger, risk, or negative consequences. Ludwig’s examples shows it is a common way to caution someone.
Frequent in
News & Media
54%
Wiki
30%
Science
4%
Less common in
Formal & Business
4%
Encyclopedias
0%
Reference
0%
Ludwig's WRAP-UP
In summary, "be warned" is a versatile phrase used to preface cautionary statements, alerting the audience to potential risks or negative outcomes. It is grammatically correct and very common in both formal and informal contexts, as confirmed by Ludwig. To maximize its effectiveness, it’s best paired with specific details and actionable advice to ensure the warning is clear and impactful. Remember that overusing it without substance can dilute its strength. Consider alternatives like "take heed", "beware", or "be cautious" depending on context, and always ensure your warning provides real value to the reader.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
you have been warned
Emphasizes that a warning has been given and consequences may follow.
beware
A direct and strong warning of danger.
be forewarned
Highlights the importance of prior knowledge of potential issues.
take heed
Emphasizes paying attention to potential dangers.
consider this a warning
A formal and direct way to express a warning.
be cautious
Suggests carefulness and prudence to avoid problems.
proceed with caution
Advises to continue, but with awareness of possible risks.
a word of caution
Introduces a cautionary piece of advice.
be mindful
Suggests keeping something in mind to avoid negative consequences.
let the buyer beware
Specifically warns buyers to be vigilant against scams or defects.
FAQs
How can I use "be warned" in a sentence?
You can use "be warned" to introduce a cautionary statement, like: "Be warned: this product may cause allergic reactions."
What's a good alternative to "be warned"?
Alternatives include "take heed", "beware", or "be cautious", depending on the level of formality and the specific context.
Is "be warned" formal or informal?
"Be warned" is generally considered neutral, suitable for both formal and informal contexts, though it can sometimes sound slightly formal depending on the situation. Phrases like "take heed" might be considered more formal.
Can "be warned" be used in any situation?
While versatile, "be warned" is best used when there is a genuine potential risk or negative outcome to highlight. Overusing it in trivial situations can dilute its impact. Consider the context to decide if alternatives like "be mindful" or "proceed with caution" are more appropriate.
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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
81%
Authority and reliability
4.6/5
Expert rating
Real-world application tested