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
the crux
Grammar usage guide and real-world examplesUSAGE SUMMARY
"the crux" is correct and usable in written English.
It is a noun, used to refer to the most important or decisive part of something. Example: The crux of the argument is that everyone should be mindful of their words and actions.
✓ Grammatically correct
News & Media
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
57 human-written examples
Herein lies the crux.
News & Media
Perhaps that is the crux.
News & Media
But there's the crux.
News & Media
That is the crux.
News & Media
And that's the crux.
News & Media
That is the crux of the issue".
News & Media
This is the crux of the poem.
News & Media
Ownership is the crux of the problem.
News & Media
Ah, the crux of the matter.
News & Media
This is the crux of the season.
News & Media
The crux, if you will.
News & Media
Expert writing Tips
Best practice
Use "the crux" when you want to emphasize the single most important or decisive aspect of a complex situation or argument. It adds a touch of sophistication to your writing.
Common error
Avoid using "the crux" in situations where simpler language would suffice. Overusing it can make your writing sound pretentious. Use it only when a situation truly warrants highlighting a critical, decisive point.
Source & Trust
88%
Authority and reliability
4.6/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "the crux" functions as a noun phrase, specifically acting as a subject complement or an object of a preposition. Ludwig AI confirms its common usage in various contexts to highlight the core or most important aspect of a situation or argument.
Frequent in
News & Media
62%
Science
12%
Formal & Business
8%
Less common in
Encyclopedias
0%
Wiki
0%
Social Media
0%
Ludwig's WRAP-UP
In summary, "the crux" is a grammatically sound and frequently used noun phrase that identifies the most important or decisive aspect of a situation. Ludwig AI confirms its correctness and widespread usage across diverse contexts, including news, science, and formal writing. While alternatives like "the heart of the matter" or "the key point" exist, "the crux" offers a precise and sophisticated way to emphasize the core issue. Remember to use it judiciously, avoiding overuse in simple contexts to maintain its impact.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
the heart of the matter
Focuses on the central and most important aspect of a situation, similar to "the crux" but emphasizes the emotional core.
the core of the issue
Similar to "the crux", pinpoints the most fundamental aspect of a problem or discussion.
the key point
Highlights the essential element that needs to be understood or addressed, offering a more straightforward alternative to "the crux".
the central issue
Emphasizes the main problem or question that needs to be resolved, comparable to "the crux" in identifying the core concern.
the bottom line
Indicates the essential point or outcome, providing a practical and concise alternative to "the crux".
the main problem
Directly points out the primary difficulty or challenge, presenting a less nuanced alternative to "the crux".
the fundamental aspect
Highlights the basic and essential part of something, offering a more descriptive alternative to "the crux".
the essence
Refers to the intrinsic nature or indispensable quality of something, sharing a philosophical connection with "the crux".
the decisive factor
Identifies the element that ultimately determines an outcome, similar to "the crux" in its impact.
the turning point
Signifies a critical moment when a significant change occurs, relating to "the crux" as a decisive stage.
FAQs
How can I use "the crux" in a sentence?
You can use "the crux" to highlight the most important aspect of a problem or argument. For example: "The crux of the matter is whether we can afford this project."
What's a good alternative to "the crux"?
Alternatives include "the heart of the matter", "the key point", or "the central issue", depending on the context.
Is it appropriate to use "the crux" in formal writing?
Yes, "the crux" is suitable for formal writing, especially when discussing complex issues or arguments. It adds a level of precision and emphasis.
What is the difference between "the crux" and "the problem"?
"The problem" refers to an issue needing resolution, while "the crux" pinpoints the most critical aspect of that problem. "The problem" is broad; "the crux" is specific and essential.
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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
88%
Authority and reliability
4.6/5
Expert rating
Real-world application tested