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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
key thing
Grammar usage guide and real-world examplesUSAGE SUMMARY
"key thing" is correct and can be used in written English.
You can use it to refer to an important or essential element, concept, or factor. For example, "The key thing to remember is that everyone has their own opinion."
✓ Grammatically correct
News & Media
Academia
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
That's the key thing".
News & Media
Here's the key thing.
News & Media
That's a key thing.
News & Media
That was the key thing for us".
News & Media
"The key thing is persistence.
News & Media
"Patience is a key thing.
News & Media
The key thing is fuel reduction.
So daily is the key thing here.
Academia
HO: This is a key thing.
Academia
The key thing again is hydration.
News & Media
The key thing we learned from it?
News & Media
Expert writing Tips
Best practice
Use "key thing" to succinctly highlight the most important element or consideration in a given situation. It's effective for summarizing complex ideas or focusing attention on what truly matters.
Common error
While "key thing" is acceptable in many contexts, avoid using it excessively in formal writing. Opt for more sophisticated alternatives like "essential element" or "crucial aspect" to maintain a professional tone.
Source & Trust
91%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "key thing" functions as a noun phrase that highlights a central element or consideration. It's used to focus attention on what is most important in a given context. Ludwig AI confirms its grammatical correctness and usability in written English.
Frequent in
News & Media
55%
Academia
20%
Science
10%
Less common in
Formal & Business
5%
Encyclopedias
5%
Wiki
5%
Ludwig's WRAP-UP
The phrase "key thing" serves to pinpoint the most crucial aspect in a given context, confirmed by Ludwig AI as grammatically sound and appropriate for written English. While widely used across News & Media, Academia, and other fields, it's essential to consider the register. In formal settings, alternatives such as "essential element" or "crucial aspect" may be more appropriate. Ludwig's examples show that "key thing" is effective for summarizing and guiding focus, making it a valuable tool in communication.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
essential element
Replaces "thing" with "element", focusing on the fundamental nature of what is important.
crucial aspect
Substitutes "key" with "crucial" and "thing" with "aspect", highlighting the decisive nature of the element.
vital component
Emphasizes the necessity of the element for the whole, using "vital" instead of "key" and "component" instead of "thing".
main point
Focuses on the central idea or argument, replacing "key thing" with a more direct expression of importance.
significant factor
Highlights the influence of the element, using "significant" to underscore its importance.
critical factor
Similar to significant factor, with critical carrying more emphasis on the factor being decisive.
important consideration
Shifts the focus to the act of thinking about something, using "consideration" instead of "thing".
central concern
Indicates a primary focus of attention or worry, replacing "thing" with a more emotional term.
fundamental issue
Highlights the basic nature of the problem, using "fundamental" to emphasize its foundational importance.
primary focus
Emphasizes the main area of attention, replacing "thing" with a term indicating concentration.
FAQs
How can I use "key thing" in a sentence?
Use "key thing" to emphasize the most important aspect of a situation. For example, "The "key thing" is to remain calm under pressure."
What are some alternatives to "key thing"?
You can use alternatives such as "essential element", "crucial aspect", or "vital component" depending on the context.
Is it always appropriate to use "key thing" in formal writing?
While grammatically correct, "key thing" may sound too informal in certain formal contexts. Consider using more sophisticated synonyms like "significant factor" or "fundamental issue".
What's the difference between "key thing" and "main point"?
"Key thing" emphasizes the importance of a single element, while "main point" focuses on the central idea or argument being conveyed. They are often interchangeable, but "main point" is more specific to communication.
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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
91%
Authority and reliability
4.5/5
Expert rating
Real-world application tested