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 principal issue
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "the principal issue" is correct and usable in written English.
It can be used to refer to the main or most important problem or topic in a discussion or analysis. Example: "In the meeting, we focused on the principal issue of budget allocation for the upcoming project."
✓ Grammatically correct
News & Media
Science
Academia
Encyclopedias
Alternative expressions(20)
the main concern
the key problem
the central question
the chief concern
the primary focus
the crucial point
the heart of the matter
the fundamental issue
the primary issue
the principal cause
the foremost issue
the main issue
the foremost concern
the biggest problem
the chief worry
the main purposes
the key issue
the key question
the overriding concern
the primary concern
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
This is the principal issue".
News & Media
The principal issue is with Richard Cathar himself.
News & Media
But the principal issue is nostalgic craft, made chic, smart and demonic.
News & Media
The principal issue is how can we design better, more humane buildings.
News & Media
The principal issue with nuclear power, and other energy sources, is cost.
News & Media
The principal issue, legal experts say, will be how regulators define the server market.
News & Media
The pebble flow is the principal issue for the design of the pebble bed reactor.
The principal issue in the case was the defendant's claimed excuse of impossibility of performance.
Academia
We therefore turn to the principal issue for consideration in this case.
Academia
"A lot of the focus has been on the pipeline, but for me retention is the principal issue".
News & Media
Their diffident use of the d-word, the principal issue that dogged post-Good Friday agreement politics, was telling.
News & Media
Expert writing Tips
Best practice
Use "the principal issue" when you want to clearly identify the most important aspect of a complex situation. It signals that the following information is crucial for understanding the overall context.
Common error
Avoid confusing "principal" (main, most important) with "principle" (a fundamental truth or proposition). Using the wrong word can significantly alter the intended meaning of your sentence.
Source & Trust
86%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "the principal issue" functions as a noun phrase, typically serving as the subject complement or object of a sentence. It identifies the most important problem or topic under consideration. According to Ludwig AI, this phrase is grammatically correct and widely used.
Frequent in
News & Media
42%
Science
22%
Academia
13%
Less common in
Encyclopedias
12%
Wiki
3%
Formal & Business
3%
Ludwig's WRAP-UP
In summary, the phrase "the principal issue" is a grammatically correct and very common noun phrase used to highlight the most important problem or topic in a given context. Ludwig AI confirms its widespread usage across diverse fields, including news, science, academia, and encyclopedias. While "the principal issue" is suitable for neutral to formal settings, it's crucial to differentiate "principal" from "principle" to avoid errors. Alternatives such as "the main concern" or "the key problem" can be used to convey a similar meaning. Ultimately, using "the principal issue" effectively helps to prioritize discussions and analyses, ensuring attention is directed toward the most crucial elements.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
the main concern
Focuses on the aspect causing worry or requiring attention.
the key problem
Emphasizes a difficulty that needs resolution.
the central question
Highlights the core inquiry that needs to be answered.
the chief concern
Stresses the primary element of worry or importance.
the primary focus
Indicates the main area of attention or concentration.
the overriding factor
Highlights the most dominant influence or consideration.
the crucial point
Emphasizes the most decisive or critical element.
the heart of the matter
Refers to the fundamental or most important aspect.
the fundamental issue
Indicates the base or root problem at hand.
the core challenge
Highlights the essential difficulty needing to be overcome.
FAQs
How can I use "the principal issue" in a sentence?
Use "the principal issue" to introduce the most important problem or topic being discussed. For example, "The principal issue is the lack of funding for the project."
What are some alternatives to "the principal issue"?
You can use alternatives like "the main concern", "the key problem", or "the central question depending on the specific context.
Is it better to say "the principal issue" or "the main issue"?
Both "the principal issue" and "the main issue" are correct and often interchangeable. "Principal" emphasizes the issue's fundamental importance, while "main" simply indicates the most prominent issue. Choose the term that best fits the specific nuance you want to convey.
What's the difference between "the principal issue" and "the main point"?
"The principal issue" refers to the most important problem or subject under discussion, while "the main point" refers to the key idea or argument being presented. They are related but not identical; an issue presents a problem to be solved, while a point presents an idea to be understood or accepted.
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