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
threatening sign
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "threatening sign" is correct and usable in written English.
It can be used to describe a warning or indication that something dangerous or harmful may occur. Example: "The dark clouds and strong winds were a threatening sign of the approaching storm."
✓ Grammatically correct
Science
News & Media
Wiki
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
2 human-written examples
We tested whether AAV-mediated myotubularin replacement could be beneficial at the functional level because muscle weakness is the constant and life threatening sign of the disease.
Science
This is obviously a very threatening sign that we are criminals against the nation".
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
55 human-written examples
But because landowners and their tenants do not recognise this right, everywhere but on the 3% of rivers where it has been formally conceded, canoeists, kayakers, swimmers and the rest of the public are barred by threatening signs, barbed wire and intimidating men insisting that they are trespassing.
News & Media
All around Shepperton Studios, threatening signs warn against unauthorised entry to the soundstages.
News & Media
A bull has cause to be a little concerned when you're out in the corral where he has his girls, but he shouldn't be so concerned that he gives you all sorts of threatening signs such as showing his side and arching his neck, shaking his head at you, etc.
Wiki
And when Meadows asked moderates if they cared which version of the bill got a vote, and they said they didn't, Meadows blew up at Ryan, saying he was "done," that it "doesn't matter," even threatening to sign a discharge petition to trigger a whole new set of immigration votes.
News & Media
This is the reason why the efficacy of a low-dose CV regimen as a first-line therapy was investigated in that subset of patients, providing no urgent situation (i.e. life-threatening sign or symptomatic dumb-bell tumour) as that regimen is thought to have a lower or delayed efficacy as compared to CE combination.
Science
Amid a widespread backlash which included companies and sports leagues threatening boycotts Pence signed a revision that prevented service from being denied on the basis of "sexual orientation, race, religion, or disability".
Encyclopedias
The emergency data contains a life threatening vital signs information such as low or high threshold value of a heartbeat.
The white-bearded chairman of the advisory council, or loya jirga, told Karzai that he miscalculated by threatening a signing delay until spring.
News & Media
A list of medically recognized potentially life threatening obstetric signs was obtained from the responses given.
Science
Expert writing Tips
Best practice
When using "threatening sign", ensure the context clearly establishes what is being threatened. Specificity enhances the impact of the phrase.
Common error
Avoid using "threatening sign" in contexts where the threat is overstated or lacks credible evidence. Overuse can dilute the phrase's impact.
Source & Trust
81%
Authority and reliability
4.1/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "threatening sign" functions as a noun phrase, typically serving as the subject or object in a sentence. It identifies something that indicates potential danger or harm. Ludwig provides examples where it describes life-threatening medical conditions or warnings against unauthorized entry.
Frequent in
Science
30%
News & Media
30%
Wiki
10%
Less common in
Formal & Business
10%
Encyclopedias
10%
Reference
10%
Ludwig's WRAP-UP
The phrase "threatening sign" denotes an indication of potential danger or harm, functioning as a noun phrase with a warning purpose. Though Ludwig AI marks it as correct, its usage is rare. While it can appear in diverse contexts, it is frequently found in scientific and news media, suggesting a neutral to formal register. Alternatives such as "ominous warning" or "menacing indication" may offer nuanced replacements. When employing this phrase, clarity and context are key to emphasizing the impending threat.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
bad sign
A simpler, more direct way to convey the same meaning.
ominous warning
Replaces 'threatening' with 'ominous' while maintaining the sense of impending danger.
menacing indication
Substitutes both words with synonyms conveying a similar sense of foreboding.
foreboding signal
Uses 'foreboding' to amplify the sense of impending doom and 'signal' as a synonym.
alarming symptom
Shifts focus to a symptom implying a cause for concern or danger.
disturbing precursor
Emphasizes the role of the sign as a predictor of something negative to come.
ill omen
A more figurative and literary way to express a negative sign.
worrying development
Focuses on the development aspect, suggesting an evolving situation that is concerning.
unfavorable portent
Replaces "sign" with "portent" to offer a more formal and literary alternative.
imminent threat indicator
Emphasizes the imminence of the threat, making the sign a clear indicator.
FAQs
How can I use "threatening sign" in a sentence?
Use "threatening sign" to indicate an indication of potential danger or harm. For example, "The increase in cyberattacks is a "threatening sign" for data security."
What are some alternatives to "threatening sign"?
Alternatives include "ominous warning", "menacing indication", or "foreboding signal", depending on the specific nuance you want to convey.
Is "threatening sign" formal or informal?
"Threatening sign" can be used in both formal and informal contexts, but its impact is greater in more serious or formal situations. However, consider that alternatives like "bad sign" are better suited for informal usage.
What does "threatening sign" imply?
A "threatening sign" implies that something negative or harmful is likely to occur, and warrants attention and potentially preventative action.
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
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
4.1/5
Expert rating
Real-world application tested