a key reason

USAGE SUMMARY

The phrase "a key reason" is correct and usable in written English.
It can be used to highlight an important factor or explanation for a particular situation or outcome. Example: "A key reason for the project's success was the team's dedication and hard work."

✓ Grammatically correct

News & Media

Academia

Formal & Business

Human-verified examples from authoritative sources

Exact Expressions

60 human-written examples

A key reason is European politics.

The New York Times

A key reason is cost.

The Guardian - Lifestyle

I think that was a key reason.

Harvard University

Public transport was a key reason Labor lost the election.

The Guardian

A key reason was fear, Dougan and others said.

The New York Times - Sports

This is a key reason for their success.

Harvard Business Review

That's a key reason companies are looking abroad.

The New York Times - Magazine

A key reason is that it works better aesthetically.

The Washington Post

A key reason is the connection between selection and moral hazard in star hospital use.

Harvard University

Student Services are a key reason for our remarkable 86% 4-year graduation rate.

Cornell University

A key reason for this is that additional information provides a form of bargaining power.

Massachusetts Institute of Technology

Expert writing Tips

Best practice

In formal writing, vary your language by occasionally using synonyms such as "a primary cause" or "the main justification" to avoid repetition.

Common error

Be careful not to present "a key reason" when there are multiple factors of equal importance. Instead, consider acknowledging other significant factors to provide a more balanced perspective.

Linguistic Context

"A key reason" functions as a noun phrase that introduces the most important explanation or cause for a particular event or situation. Ludwig shows its correct usage across diverse contexts. It serves to highlight the primary factor among other contributing elements.

Expression frequency: Very common

Frequent in

News & Media

55%

Academia

25%

Formal & Business

20%

Less common in

Science

0%

Wiki

0%

Reference

0%

Ludwig's WRAP-UP

In summary, "a key reason" is a versatile and commonly used phrase to highlight the most significant cause or explanation for a particular situation. As confirmed by Ludwig, it is grammatically correct and appropriate for various contexts, ranging from news articles to academic papers. The phrase is most frequently encountered in News & Media sources, followed by Academia and Formal & Business settings.

When using "a key reason", ensure that it genuinely represents the most influential factor and consider varying your language with synonyms like "a primary cause" or "the main justification" to avoid repetition. Pay attention not to overstate its importance when other significant factors are also present.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

a primary cause

Emphasizes the fundamental role in bringing about a result; suggests a direct causal relationship.

a major factor

Indicates a significant influence, but may not be the only reason.

the main justification

Highlights the principal reason used to defend or support an action or decision.

a significant determinant

Suggests a strong influence in deciding an outcome; more formal.

the principal motive

Focuses on the underlying intention or drive behind an action.

a crucial element

Points out an essential part or aspect necessary for a particular outcome.

the central premise

Highlights the core assumption or foundation upon which something is based.

a driving force

Emphasizes the power or energy behind a particular action or trend.

the underlying rationale

Focuses on the fundamental logic or reasoning that supports a decision.

a notable contributor

Suggests a relevant participation or addition to an outcome.

FAQs

How can I use "a key reason" in a sentence?

You can use "a key reason" to introduce the most important explanation for a situation. For example, "A key reason for the company's success was its innovative marketing strategy."

What phrases are similar to "a key reason"?

Alternatives include phrases like "a primary cause", "a major factor", or "the main justification", depending on the nuance you wish to convey.

Is it appropriate to use "a key reason" in formal writing?

Yes, "a key reason" is suitable for formal writing. However, using a variety of similar phrases can enhance the sophistication of your writing. Consider options like "a significant determinant".

What is the difference between "a key reason" and "a reason"?

"A reason" simply indicates a cause or explanation. "A key reason" emphasizes that this particular reason is more important or influential than others. It highlights the most significant factor.