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 chief reason
Grammar usage guide and real-world examplesUSAGE SUMMARY
"the chief reason" is a correct and commonly used phrase in written English.
It is typically used to introduce the main or most important reason for something. Example: The chief reason for the company's success is its dedicated employees who constantly strive for excellence in their work.
✓ Grammatically correct
News & Media
Science
Formal & Business
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
The chief reason?
News & Media
The chief reason resides in Downing Street.
News & Media
The chief reason is geography.
News & Media
The chief reason for the company's survival?
News & Media
Yet the chief reason is a lack of effective leadership.
News & Media
The chief reason is the utter exhaustion of the country.
News & Media
One could argue it's the chief reason rental outfits exist.
News & Media
The chief reason for Mr. Chafee's troubles appears to be Rhode Island's dismal economy.
News & Media
The chief reason for holding stocks is to smooth out bumps in the supply chain.
News & Media
The church says the chief reason for this upsurge is the revised law itself.
News & Media
Where territory has changed hands, military action has not always been the chief reason.
News & Media
Expert writing Tips
Best practice
When using "the chief reason", ensure that the subsequent explanation provides sufficient evidence or detail to support the claim that it is indeed the most important factor.
Common error
Avoid presenting secondary or less important reasons as "the chief reason". Always prioritize the most impactful factor to maintain clarity and accuracy.
Source & Trust
87%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "the chief reason" functions as a noun phrase acting as a subject complement or adverbial phrase to highlight the most important cause or explanation. Ludwig AI confirms this with numerous examples from diverse sources.
Frequent in
News & Media
65%
Science
15%
Formal & Business
10%
Less common in
Encyclopedias
5%
Academia
5%
Reference
0%
Ludwig's WRAP-UP
In summary, "the chief reason" is a common and grammatically sound phrase used to emphasize the primary cause or justification for something. Ludwig AI confirms its validity and provides numerous examples across various contexts. It's suitable for neutral and formal registers, making it a versatile choice for writing across different domains. Remember to ensure that the identified "chief reason" is indeed the most significant factor and supported by evidence. While alternatives exist, "the chief reason" directly and effectively conveys the importance of the stated cause.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
the main reason
Replaces "chief" with "main", offering a more common synonym while retaining the core meaning.
the primary reason
Substitutes "chief" with "primary", emphasizing the foremost cause.
the principal reason
Uses "principal" in place of "chief", highlighting the most important factor.
the foremost reason
Replaces "chief" with "foremost", indicating the leading or most prominent reason.
the leading reason
Substitutes "chief" with "leading", suggesting the reason that takes precedence.
the key reason
Uses "key" in place of "chief", emphasizing the essential or crucial reason.
the central reason
Replaces "chief" with "central", highlighting the reason at the core of the matter.
the dominant reason
Substitutes "chief" with "dominant", indicating the most influential reason.
the overriding reason
Uses "overriding" in place of "chief", suggesting a reason that surpasses all others.
the fundamental reason
Replaces "chief" with "fundamental", emphasizing the basic or essential reason.
FAQs
How can I use "the chief reason" in a sentence?
Use "the chief reason" to introduce the primary cause or explanation for something. For example, "The chief reason for the project's delay was a lack of funding".
What can I say instead of "the chief reason"?
You can use alternatives like "the main reason", "the primary reason", or "the principal reason" to convey a similar meaning.
Which is correct, "the chief reason is" or "the chief reason was"?
Both "the chief reason is" and "the chief reason was" are grammatically correct. Use "is" for present or ongoing situations and "was" for past situations.
What's the difference between "the chief reason" and "one of the main reasons"?
"The chief reason" indicates the single most important factor, while "one of the main reasons" suggests that there are multiple important factors. Use "one of the main reasons" when there is not a singular cause.
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
87%
Authority and reliability
4.5/5
Expert rating
Real-world application tested