the principal reason

USAGE SUMMARY

The phrase "the principal reason" is correct and usable in written English.
It can be used when identifying the main cause or justification for something. Example: "The principal reason for the project's delay was a lack of funding."

✓ Grammatically correct

News & Media

Science

Academia

Human-verified examples from authoritative sources

Exact Expressions

60 human-written examples

The principal reason is simple.

The Guardian - Opinion

The principal reason is higher fuel prices.

The New York Times

"The principal reason that hasn't happened is the bands themselves.

The Guardian - Music

"That's the principal reason why corporations love corporate indentured education".

The New York Times

Diabetes is the principal reason adults go blind.

The New York Times

The principal reason for withdrawing is to save money.

The New Yorker

That's the principal reason I carry a jacket.

The New York Times

As it should be, Mr. Mitchell remains the principal reason to revisit "La Mancha".

The New York Times

The rise in residential rents was the principal reason in this instance.

The New York Times

He's the principal reason we are a much more viable franchise than we were.

The New York Times - Sports

One, it helps them relax and relieve stress, so this is perhaps the principal reason.

Yale University

Expert writing Tips

Best practice

When using "the principal reason", ensure it clearly identifies the primary cause or justification, leaving no ambiguity for the reader.

Common error

Avoid using "the principal reason" when there are multiple significant factors at play. Use it only when one reason clearly outweighs all others.

Linguistic Context

The phrase "the principal reason" functions as a noun phrase that typically serves as a subject complement or an adverbial modifier to introduce the primary cause or justification for a statement or event. Ludwig provides numerous examples of this usage.

Expression frequency: Very common

Frequent in

News & Media

47%

Science

27%

Academia

5%

Less common in

Formal & Business

8%

Reference

0%

Wiki

0%

Ludwig's WRAP-UP

In summary, "the principal reason" is a grammatically sound and frequently used phrase to introduce the primary cause or justification for something. As Ludwig AI confirms, it's suitable for various contexts, though it's most common in News & Media and Science. When using this phrase, be sure that the reason you are highlighting is indeed the most significant, avoiding overstatement. Alternatives such as "the main cause" or "the key factor" can be used depending on the specific nuance you want to convey. Ludwig's analysis ensures that you can confidently incorporate "the principal reason" into your writing with clarity and precision.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

the main cause

Focuses more directly on causation rather than justification.

the primary driver

Emphasizes the driving force or impetus behind an event or action.

the chief factor

Highlights the most important element among several contributing factors.

the key factor

Emphasizes the essential or crucial aspect.

the underlying reason

Suggests a more fundamental or less obvious explanation.

the mainspring

Implies a motivating force or source of action.

the central point

Shifts the focus to the most important idea or consideration.

the core reason

Highlights the most fundamental explanation.

the biggest reason

More informal and emphasizes the magnitude of the reason.

the foremost reason

Stresses priority or importance in a more formal way.

FAQs

How can I use "the principal reason" in a sentence?

You can use "the principal reason" to introduce the main cause or justification for something. For example, "The principal reason for the project's delay was a lack of funding."

What can I say instead of "the principal reason"?

You can use alternatives like "the main cause", "the primary driver", or "the key factor" depending on the context.

Which is correct, "the principal reason" or "the main reason"?

Both "the principal reason" and "the main reason" are correct. "The principal reason" is slightly more formal.

What's the difference between "the principal reason" and "a reason"?

"The principal reason" identifies the most important reason, while "a reason" simply indicates one possible explanation among many.