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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
to warn for
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "to warn for" is not correct in standard written English.
The correct expression would typically be "to warn about" or "to warn of." Example: "The meteorologist warned about the approaching storm."
⚠ May contain grammatical issues
Science
News & Media
Wiki
Alternative expressions(1)
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
10 human-written examples
Karen Kosiba, a tornado researcher at the Center for Severe Weather Research in Boulder, Colo., said she was "surprised" by the declines in tornado warning performance and agreed efforts to try to warn for the fickle QLCS tornadoes could be contributing.
News & Media
"They are impossible or difficult to warn for, because they can spin up within five minutes," he said.
News & Media
The circulations that produce them are often smaller and shorter-lived than in the storms on the Great Plains and so are harder to detect and to warn for, though the tornadoes they spawn can be just as dangerous.
News & Media
The main function of a computer supported outbreak detection system is to warn for potential outbreaks.
Considering this aspect we want to warn for generalisations even in Belgium.
Science
Early diagnosis is important to warn for weaning failure, to guide progressive ambulation and to predict outcome.
Science
Human-verified similar examples from authoritative sources
Similar Expressions
50 human-written examples
Alarms were suggested - for example, to warn of prolonged intravenous line duration or the end of a course of antibiotic therapy.
Science
"That tsunami stone was a way to warn descendants for the next 100 years that another tsunami will definitely come," he said.
News & Media
Congressional investigators have accused the company of neglecting to warn customers for more than 10 years about faulty ignition switches capable of disabling airbags in Chevrolet Cobalt and Saturn Ion vehicles.
News & Media
Now Staines is about to warn Perry for defaming him publicly.
News & Media
However, the umpires were right to warn him for time-wasting after he attempted a switch-hit.
News & Media
Expert writing Tips
Best practice
Avoid using the phrase "to warn for" in formal writing. Opt for more common and grammatically correct alternatives like "to warn about" or "to warn of".
Common error
Many writers mistakenly use "for" after "warn" due to its association with purpose. Remember that "warn" typically takes "about" or "of" to indicate the subject of the warning.
Source & Trust
81%
Authority and reliability
2.8/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "to warn for" functions as a prepositional phrase where 'warn' is the verb, 'to' is an infinitive marker and 'for' acts as a preposition, but as Ludwig AI points out, this is not standard English. Its intended function is to express the act of alerting someone regarding a specific reason or situation.
Frequent in
Science
33%
News & Media
33%
Wiki
17%
Less common in
Formal & Business
0%
Encyclopedias
0%
Reference
0%
Ludwig's WRAP-UP
In summary, while the phrase "to warn for" appears in some contexts, it is generally considered grammatically incorrect in standard English. As Ludwig AI states, it’s advisable to use more accepted alternatives like "to warn about" or "to warn of". The contexts where "to warn for" appears range from scientific articles to news reports. Given its non-standard nature, exercise caution when using this phrase, opting for clearer and more conventional alternatives to ensure effective communication. While it might be understood in certain specific contexts, it lacks the broad acceptance required for formal writing.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
to warn about
Uses the preposition "about", which is the most common and grammatically correct alternative.
to warn of
Uses the preposition "of", another grammatically correct and widely accepted alternative.
to alert to
Employs the verb "alert" instead of "warn", maintaining a formal tone.
to caution against
Uses "caution" and specifies what action to avoid.
to advise about
Replaces "warn" with "advise", focusing on guidance rather than imminent danger.
to notify of
Employs "notify", suggesting a formal announcement of a potential issue.
to give notice of
Uses a more formal phrasing with "give notice", indicating a formal communication.
to forewarn about
Adds emphasis with "forewarn", highlighting the advance nature of the warning.
to flag for attention
More business-oriented, indicating that you need to call the attention to something.
to raise awareness of
Focuses on increasing general understanding of the issue.
FAQs
Is it grammatically correct to say "to warn for"?
The phrase "to warn for" is not considered grammatically correct in standard English. It's more appropriate to use phrases like "to warn about" or "to warn of".
What are some alternatives to "to warn for"?
Better alternatives include "to warn about", "to warn of", "to alert to", or "to caution against", depending on the specific context.
When is it acceptable to use "to warn for"?
While some instances of "to warn for" appear in various texts, they are generally considered non-standard. It's best to avoid this phrase in formal writing. If you want to take this risk be sure the expression is used and well understood in your specific context.
What's the difference between "to warn about" and "to warn for"?
"To warn about" is a grammatically correct construction that indicates the subject of the warning. "To warn for" is generally considered incorrect and should be avoided in favor of other options.
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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
2.8/5
Expert rating
Real-world application tested