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
and principally
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "and principally" is correct and usable in written English.
It can be used to indicate that something is primarily or mainly the case, often in a list or explanation. Example: "The project focuses on renewable energy sources, and principally, solar and wind power."
✓ Grammatically correct
Science
News & Media
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
"FHM understood how men communicate, and principally that's through humour," Soutar says.
News & Media
Portuguese explorers of the region first encountered Tupians and principally dealt with them for many years.
Encyclopedias
Illumination has to come also, and principally, from performance, and here a lot of the performances were unremarkable.
News & Media
And, principally, why is it, again, that chewing gum is so often taboo — both in school and elsewhere?
News & Media
Sinonatrix typically grows to a length of about 1 metre (3 feet) and principally feeds upon fish.
Encyclopedias
Middelhoff subsequently set out to shed unprofitable businesses, reinvigorate traditional ones, and, principally, make Bertelsmann a leading provider of content.
Encyclopedias
Over the last decade or so it expanded, mainly through franchising, and principally to locations on both coasts, but also to malls in Arizona, Illinois and Missouri.
News & Media
Mary Taylor Simeti, who has written vividly about Sicily where she lives, focuses "Travels With a Medieval Queen" on Constance and principally on her yearlong journey.
News & Media
"This is the worst thing we could do to this state, its image and, principally, its people," he said of the lottery.
News & Media
The competition is backed and principally funded by the Department for International Development (DfId) as part of an initiative to raise public awareness of such issues.
News & Media
Kenya's leadership may be tempted to move ever closer to China in an effort to shield itself from Western, and principally U.S., pressure to reform.
News & Media
Expert writing Tips
Best practice
Use "and principally" to clearly introduce the most important element or factor within a list or explanation. It adds emphasis and directs the reader's attention to the key point.
Common error
Avoid using "and principally" when simply adding another item to a list without intending to highlight its primary importance. Ensure that the element introduced by this phrase genuinely stands out as the most significant.
Source & Trust
83%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "and principally" functions as a conjunctive adverbial phrase. It connects ideas while emphasizing the primary or most important element among them. As Ludwig AI confirms, this phrase is correctly used in written English to highlight a main point or aspect.
Frequent in
Science
51%
News & Media
39%
Encyclopedias
10%
Less common in
Formal & Business
0%
Wiki
0%
Reference
0%
Ludwig's WRAP-UP
In summary, the phrase "and principally" is a grammatically correct and frequently used expression to emphasize the primary aspect or element within a statement. Ludwig AI analysis confirms its validity and common usage. Predominantly found in scientific, news media, and encyclopedia sources, it serves to prioritize information and guide the reader's focus. While versatile, it should be used judiciously to avoid redundancy and ensure the highlighted element is genuinely significant. Alternatives like "and primarily" or "and mainly" can offer nuanced variations in emphasis. Therefore, "and principally" is a useful phrase for adding emphasis and drawing attention to the most important part of your message.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
and primarily
Emphasizes the main aspect or focus, similar to "and principally" but with a slightly more common usage.
and mainly
Highlights the major component or element, suggesting a quantitative aspect of importance.
and chiefly
Indicates the most important or influential factor, often used in formal contexts.
and above all
Stresses the supreme importance of something compared to other considerations.
and for the most part
Implies that something is generally true, with possible exceptions.
and fundamentally
Focuses on the core or essential nature of something.
and at its heart
Highlights the central and most crucial element.
and in essence
Conveys the basic or most important aspect of something.
and at bottom
Highlights the underlying reason or cause, often revealing a fundamental truth.
and in the first place
Highlights the primary consideration.
FAQs
How can I use "and principally" in a sentence?
Use "and principally" to emphasize the main point or aspect within a larger context. For instance, "The research focuses on renewable energy, and principally, solar power".
What are some alternatives to "and principally"?
You can use alternatives like "and primarily", "and mainly", or "and chiefly" depending on the context.
Is it redundant to use "and principally" after "mainly"?
While not strictly redundant, it can sound repetitive. Choose the phrase that best emphasizes the primary aspect you want to highlight. Consider rephrasing for clarity if both terms seem necessary.
What's the difference between "and principally" and "especially"?
"And principally" highlights the main or most important aspect, while "especially" introduces a notable example or exception. They serve different purposes in emphasizing information.
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
83%
Authority and reliability
4.5/5
Expert rating
Real-world application tested