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 ultimate reason
Grammar usage guide and real-world examplesUSAGE SUMMARY
"the ultimate reason" is a perfectly correct and usable phrase in written English.
You can use it when you wish to refer to the most important or convincing argument or explanation for something. For example, "The ultimate reason I decided to move to another city is that I wanted a fresh start."
✓ Grammatically correct
News & Media
Science
Encyclopedias
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
59 human-written examples
The ultimate reason is globalization.
News & Media
The ultimate reason why so much of this works is down to Sarandon herself.
News & Media
But according to Reuters, price was the ultimate reason why he deal was abandoned.
News & Media
"But the ultimate reason we're here is that the land came up.
News & Media
The ultimate reason for this dI1/dV1 dependence is not clear.
Science & Research
Andrea Huguely, a spokeswoman for American, said that the ultimate reason for a cancellation prevails — in this case, bad weather.
News & Media
Perhaps the ultimate reason, however, is simply that in 27 years the CHP had made too many enemies.
Encyclopedias
But none of these was the ultimate reason that the N.Y.P.D. vice squad raided the Stonewall that night.
News & Media
But perhaps the ultimate reason to mix work and pleasure is the hope that it could help your career.
News & Media
So perhaps the ultimate reason for the cessation of Point Horror is just that today's kids have higher standards.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
1 human-written examples
Absolutely not, because it's too well, they wouldn't know why, but that's the ultimate reason too expensive.
Academia
Expert writing Tips
Best practice
Use "the ultimate reason" to clearly state the most important or decisive factor in a situation to avoid ambiguity.
Common error
Avoid using "the ultimate reason" too frequently in your writing, as it can diminish its impact. Consider alternative phrases like "the primary cause" or "the main factor" to maintain reader engagement.
Source & Trust
86%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "the ultimate reason" functions as a noun phrase that typically serves as a subject complement or object within a sentence. As supported by Ludwig, it identifies the most important cause or justification for a particular event or situation.
Frequent in
News & Media
43%
Science
39%
Encyclopedias
5%
Less common in
Academia
4%
Wiki
3%
Formal & Business
1%
Ludwig's WRAP-UP
In summary, "the ultimate reason" is a versatile and frequently used phrase that serves to highlight the most important cause or justification in a given situation. As Ludwig AI confirms, it is grammatically correct and widely accepted. With a neutral tone, it fits seamlessly into various contexts, from news articles to scientific discussions. While alternatives exist to add variety to your writing, understanding the contexts and frequency can empower effective and impactful communication. Remember to avoid overuse to maintain the phrase's impact and clarity.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
the supreme justification
Indicates the most valid and important reason.
the definitive explanation
Highlights the conclusive nature of the reason.
the core cause
Emphasizes the fundamental or root cause.
the central explanation
Highlights the explanatory aspect rather than causality.
the primary driver
Focuses on the driving force rather than just a reason.
the key factor
Focuses on a significant element influencing an outcome.
the underlying rationale
Emphasizes the justification or logic behind something.
the principal motive
Focuses on the driving force behind an action.
the main impetus
Highlights the motivating force behind an action.
the chief determinant
Highlights the decisive element in a situation.
FAQs
How can I use "the ultimate reason" in a sentence?
You can use "the ultimate reason" to highlight the most important cause or justification for something. For instance, "The ultimate reason for the project's success was the team's dedication."
What phrases are similar to "the ultimate reason"?
Alternatives include "the primary reason", "the main cause", or "the key factor", each offering a slightly different nuance.
Is it redundant to use "the ultimate reason why"?
While not strictly incorrect, using "the ultimate reason why" can be redundant. It's often clearer to simply say "the ultimate reason" or "the reason is that".
What is the difference between "the ultimate reason" and "the main reason"?
"The ultimate reason" emphasizes the most important or decisive factor, while "the main reason" simply refers to a significant factor without necessarily being the most important.
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
86%
Authority and reliability
4.5/5
Expert rating
Real-world application tested