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
principal matter
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "principal matter" is grammatically correct and can be used in written English.
It is often used to refer to the main or most important subject or topic of a discussion or piece of writing. Example: In his speech, the politician addressed the principal matter at hand - the need for education reform.
✓ Grammatically correct
News & Media
Science
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
7 human-written examples
"Live, that's the principal matter".
News & Media
A witty, sparkling memoir despite its principal matter: two decades of encounters with psychotherapists who were, with one splendid exception, remote, inappropriately involved or just peculiar.
News & Media
"The principal matter is the economy: what we have done and what we have to perfect and even eliminate as we are up against an imperative to make full accounts of what the country really has available, of what we have to live and for development," the newspaper quoted the president as saying.
News & Media
The first we notice is the principal matter in respect to which testimony was offered, which has been most largely discussed by counsel on both sides, and that is the validity of the reduction in the charges of the stock-yards company made by the act in question.
Academia
In crisis situations, the evacuation of people from endangered areas (EA) is the overriding and principal matter.
His principal matter of concern was the enforcement of U.S. neutrality with respect to the French Revolutionary Wars.
Wiki
Human-verified similar examples from authoritative sources
Similar Expressions
53 human-written examples
The recapitulation presents the principal subject matter of the movement in a new state of equilibrium.
Encyclopedias
Interlocutory decree, generally, a judicial decision that is not final or that deals with a point other than the principal subject matter of the controversy at hand.
Encyclopedias
It was the language, and the principal subject matter, of Greek mathematics, was the mainstay of elementary education in the subject, and has an obvious visual appeal.
Encyclopedias
Several factors give the stories an ageless quality, including Woodrell's precise, hard-edge language and his principal subject matter — death and love and family connections and neighborly disputes — which is as old as humankind itself.
News & Media
It presents a small fraction of the work of an extraordinary, but largely unknown, Bavarian artist who made London both his home and his principal subject matter after arriving in England in 1816.
News & Media
Expert writing Tips
Best practice
Use "principal matter" when you want to emphasize the core issue or subject that needs attention. It adds a formal tone to your writing.
Common error
Avoid substituting "principal" (main) with "principle" (a fundamental truth or proposition). Remember that "principal" in "principal matter" refers to the most important thing, while "principle" refers to a guiding rule.
Source & Trust
86%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "principal matter" functions as a noun phrase, typically serving as the subject or object of a sentence. It identifies the most important or central topic under consideration. Ludwig AI confirms its correct usage.
Frequent in
News & Media
43%
Science
29%
Academia
14%
Less common in
Wiki
14%
Encyclopedias
0%
Formal & Business
0%
Ludwig's WRAP-UP
The phrase "principal matter" is a grammatically correct and relatively uncommon noun phrase used to denote the main or most important issue. As indicated by Ludwig AI, it's usage is generally considered correct. Analysis of usage patterns shows it's frequently found in News & Media, Science, and Academic contexts, suggesting a formal or neutral register. Remember not to confuse "principal" with "principle". Alternatives include "main issue" and "primary concern". Using "principal matter" effectively can add clarity and emphasis to your writing.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
main issue
Focuses on the core problem or subject.
primary concern
Emphasizes the element of worry or importance.
key subject
Highlights the importance of the topic.
central theme
Refers to the overarching idea or concept.
major point
Indicates the most significant aspect.
chief topic
Highlights the topic's dominance in a discussion.
core element
Focuses on the fundamental part of something.
essential aspect
Emphasizes the necessity of the consideration.
significant question
Highlights a key inquiry or problem to be addressed.
critical issue
Emphasizes urgency or importance of the issue.
FAQs
How to use "principal matter" in a sentence?
Use "principal matter" to refer to the main issue or subject. For example, "The "principal matter" discussed in the meeting was the budget deficit."
What can I say instead of "principal matter"?
You can use alternatives like "main issue", "primary concern", or "key subject" depending on the context.
Which is correct, "principal matter" or "principle matter"?
"Principal matter" is correct. "Principal" refers to the main or most important thing, while "principle" is a fundamental truth or proposition. So, the correct phrase is ""principal matter"".
What's the difference between "principal matter" and "main concern"?
"Principal matter" and "main concern" are similar, but "principal matter" is slightly more formal and emphasizes the core issue, while "main concern" highlights the primary worry or area of interest.
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