a key

USAGE SUMMARY

The phrase "a key" is correct and usable in written English.
It can be used when referring to an important element or factor that unlocks or enables something. Example: "Communication is a key component of a successful relationship."

✓ Grammatically correct

News & Media

Wiki

Formal & Business

Human-verified examples from authoritative sources

Exact Expressions

60 human-written examples

Press the A key.

WikiHow

Deselect everything (the A key).

WikiHow

That's a key factor.

The New Yorker

With a key change.

The Guardian - TV & Radio

"That's a key point.

The New York Times

That's a key ingredient.

The New York Times

He's a key figure.

Independent

"It's a key focus".

The New York Times

There was a key.

The New Yorker

"It's a key human feature.

The New York Times

This is a key point.

The New York Times

Expert writing Tips

Best practice

When using "a key", ensure it clearly identifies the most important element or factor being discussed.

Common error

Avoid using "a key" excessively in writing; diversify vocabulary with synonyms like "essential", "crucial", or "vital" to maintain reader engagement.

Linguistic Context

The phrase "a key" functions primarily as an adjective modifying a noun, indicating that the noun is of utmost importance or plays a crucial role. Ludwig AI confirms its grammatical correctness and usability. Examples from Ludwig demonstrate its use in diverse contexts.

Expression frequency: Very common

Frequent in

News & Media

35%

Wiki

30%

Formal & Business

10%

Less common in

Science

8%

Encyclopedias

7%

Reference

5%

Ludwig's WRAP-UP

In summary, the phrase "a key" is a versatile and widely used expression to denote something of high importance or criticality. As Ludwig AI confirms, it is grammatically correct and appears frequently in various contexts, including news, wikis, and business settings. While "a key" is useful for highlighting essential elements, remember to diversify your language with synonyms like "crucial" or "essential" to avoid overuse. It's generally appropriate for neutral registers, making it suitable for diverse written and spoken communication needs. When used, ensure that it clearly identifies the most important factor within the scope of discussion.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

a crucial element

Replaces 'key' with 'crucial,' emphasizing the importance of the element.

an essential component

Substitutes 'key' with 'essential component,' highlighting that the element is necessary.

a vital aspect

Uses 'vital aspect' instead of 'a key,' stressing that the element is indispensable.

a critical factor

Replaces 'key' with 'critical factor,' indicating that the element is decisive.

a cornerstone

Employs 'cornerstone,' suggesting the element is foundational and essential.

a central point

Uses 'central point' to convey that the element is the main focus or core.

a pivotal moment

Replaces 'key' with 'pivotal,' stressing the importance of a specific moment.

a linchpin

Uses 'linchpin,' signifying that the element is essential for holding things together.

an integral part

Replaces 'key' with 'integral part,' emphasizing that the element is fundamentally important.

a fundamental ingredient

Substitutes 'key' with 'fundamental ingredient', indicating a basic and necessary component.

FAQs

How to use "a key" in a sentence?

Use "a key" to highlight an element that is essential or crucial for achieving a specific outcome. For example, "Communication is "a key" to a successful relationship".

What can I say instead of "a key"?

You can use alternatives like "a crucial element", "an essential component", or "a vital aspect" depending on the context.

Which is correct, "a key" or "the key"?

Both are correct, but "a key" refers to one of many possible keys, whereas "the key" refers to a specific, unique key already identified or implied in the context.

What's the difference between "a key" and "an essential"?

"A key" emphasizes importance in unlocking or enabling something, while "an essential" highlights necessity or indispensability. They're often interchangeable but carry slightly different connotations.