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
a worrying thought
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "a worrying thought" is correct and usable in written English.
It can be used when expressing concern or anxiety about a particular idea or situation. Example: "As I lay in bed, a worrying thought crossed my mind about the future of our planet."
✓ Grammatically correct
News & Media
Sport
Books
Science
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
That's a worrying thought.
News & Media
A worrying thought.
News & Media
But it feels, somehow, as though it has broken apart from the way things have always been, and that is a worrying thought.
News & Media
But I can't help but be struck by a worrying thought: rather than the NHS being a safety net, nowadays it's as if it isn't safe to be sick.
News & Media
When Swindon lost at Leyton Orient earlier this month, the Italian made top billing, prompting Paul Doyle to begin his report with a worrying thought: For a while Paolo Di Canio seemed in danger of finishing this match naked.
News & Media
Bachmann was careful to remind everyone watching that she was born and raised in Waterloo and Iowa: "I always say everything I need to know I learned in Iowa," she said, a worrying thought given that she left the state around the age of 10.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
50 human-written examples
"You misunderstood this!" "Why did you change that note?" And so on – a slightly worrying thought.
News & Media
For Abdulaziz Almashi, a Syrian refugee living in Britain since 2009, the idea that these attacks should influence British attitudes to refugees is a deeply worrying thought.
News & Media
We will include the Hospital Anxiety and Depression Scale (HADS) to measure symptoms of anxiety (HADS-A: e.g., "Worrying thoughts go through my mind") and depression (HADS-D: e.g., "I feel as I am slowed down") in DM patients [ 37].
Science
"I think the combination of an over-regulated press with an unregulated internet is a very, very worrying thought".
News & Media
"Not even myself, and that is a vexing and worrying thought".
Encyclopedias
Expert writing Tips
Best practice
Follow "a worrying thought" with a clear explanation of why the thought is concerning. Provide context and evidence to support your claim.
Common error
Avoid using "a worrying thought" in overly casual or informal settings where simpler expressions of concern would be more appropriate. It can sound stilted if misused.
Source & Trust
88%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "a worrying thought" functions as a noun phrase, often acting as the subject or object of a sentence. According to Ludwig AI, it expresses a concern or anxiety. It introduces an idea that causes unease, as seen in examples from news and media sources.
Frequent in
News & Media
72%
Science
15%
Books
5%
Less common in
Encyclopedias
3%
Formal & Business
3%
Sport
2%
Ludwig's WRAP-UP
In summary, the phrase "a worrying thought" is a grammatically correct and usable expression that conveys concern or anxiety. Ludwig AI confirms this. While not overly common, it finds frequent use in news and media, scientific publications, and books. Its function is typically to introduce a point of potential negativity or concern. When writing, use this phrase to set a cautious tone, but avoid overuse in casual contexts. Consider alternatives such as "a troubling idea" or "a concerning notion" for nuanced expression. The phrase maintains a neutral to formal register, making it suitable for various serious and reflective contexts.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
a troubling idea
Replaces "worrying" with "troubling", focusing on the disturbing nature of the idea.
a concerning notion
Substitutes "worrying" with "concerning" and "thought" with "notion", highlighting the cause for concern.
a disturbing prospect
Replaces "thought" with "prospect", emphasizing the potential negative outcome.
a disquieting feeling
Shifts from a cognitive "thought" to an emotional "feeling", emphasizing unease.
a frightening possibility
Emphasizes the fear associated with the potential outcome of the thought.
a grave concern
Replaces "worrying thought" with a more direct expression of seriousness.
a cause for alarm
Highlights the need for attention due to potential danger.
an alarming consideration
Replaces "worrying" with "alarming" and "thought" with "consideration", highlighting the potential danger.
a source of anxiety
Focuses on the anxiety stemming from the thought.
a depressing contemplation
Replaces "worrying" with "depressing" and "thought" with "contemplation", emphasizing the negative emotional impact.
FAQs
What does "a worrying thought" mean?
The phrase "a worrying thought" refers to an idea or consideration that causes concern, anxiety, or unease. It suggests that the thought has potentially negative implications or outcomes.
How can I use "a worrying thought" in a sentence?
You can use "a worrying thought" to introduce a point of concern or potential negative consequence. For example, "A worrying thought crossed my mind as I considered the impact of the new policy."
What can I say instead of "a worrying thought"?
You can use alternatives like "a troubling idea", "a concerning notion", or "a disturbing prospect" depending on the specific nuance you want to convey.
When is it appropriate to use "a worrying thought" in writing?
It is appropriate to use "a worrying thought" in contexts where you want to express concern or anxiety about a particular idea, situation, or potential outcome. It is often used in more formal or serious writing.
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
88%
Authority and reliability
4.5/5
Expert rating
Real-world application tested