for an unknown reason

USAGE SUMMARY

"for an unknown reason" is correct and usable in written English.
You can use it when you don't know why something is happening or why something has happened. For example: "The train was cancelled for an unknown reason."

✓ Grammatically correct

News & Media

Science

Wiki

Academia

Encyclopedias

Human-verified examples from authoritative sources

Exact Expressions

60 human-written examples

An adolescent koala, seated on a trampoline, cries for an unknown reason, clutching 2mg Xanax and a full-grown hamster, adjacent Krispy Kreme donuts.

Vice

Will also wants to find him, but for an unknown reason of his own.

The Guardian - TV & Radio

For an unknown reason, the Jeep drove away, the report by the U.S. Park Police states.

The Washington Post

The next day she is angry to see that he has, for an unknown reason, clipped and destroyed them all.

The New Yorker

However, for an unknown reason, the accuracy with α ≈ 0.03 is smaller than that with α = 0 (results not shown).

Nature

For an unknown reason, the site was deserted for many centuries after the end of the 10th century AD.

Quaternary International

Investigators believe Trejo walked out of a home for an unknown reason when he was shot outside near the street.

The New York Times

The police said he pulled out in front of the oncoming truck at the intersection of two highways and stopped the van for an unknown reason.

The New York Times - Sports

Around noon, Ms. Gyles gave the student his birthday punches, 11 for each year, one for good luck and one for an unknown reason, the police said.

The New York Times

"For an unknown reason the driver lost control of the vehicle and the vehicle partially spun around and began to travel in a south-easterly direction.

The Guardian - Film

Nørgaard was reportedly shot dead at close range after going outside for an unknown reason at the time the attacker struck.

The Guardian

Expert writing Tips

Best practice

This phrase is suitable for both formal and informal contexts and is helpful in providing information without making assumptions when the actual reason is not available.

Common error

While "for an unknown reason" is a useful phrase, avoid overusing it in your writing. Too many instances of unexplained events can make your writing seem vague or lacking in detail. Try to investigate and provide possible reasons or context whenever possible.

Linguistic Context

The phrase "for an unknown reason" functions as an adverbial phrase modifying a verb or clause, indicating the absence of a known cause or explanation for an event or action. Ludwig confirms the phrase's proper usage.

Expression frequency: Very common

Frequent in

News & Media

37%

Science

35%

Wiki

13%

Less common in

Academia

5%

Encyclopedias

3%

Formal & Business

0%

Ludwig's WRAP-UP

In summary, the phrase "for an unknown reason" is a versatile adverbial phrase used to indicate a lack of knowledge regarding the cause of an event. Ludwig AI validates that it is grammatically correct and appropriate for various contexts, ranging from formal to informal. It is most commonly found in News & Media and Science sources. When using this phrase, be mindful of overuse and consider providing possible reasons when possible. The related phrases can offer alternative ways to express uncertainty, adding variety to your writing.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

for reasons unknown

This alternative emphasizes the absence of reasons being made clear, similar to the original phrase but with a slightly different structure.

for no discernible reason

This emphasizes that there isn't any apparent or noticeable reason for the event.

without explanation

This highlights that there was no explanation provided or known for the action or event.

for some reason

This option is more general, simply indicating that there's a reason without specifying whether it's known or unknown.

inexplicably

Similar to 'mysteriously', this indicates that the event cannot be explained or understood.

unaccountably

This adverb suggests that there is no apparent or logical explanation for the action.

mysteriously

This adverb suggests the event happened in a way that is difficult to understand or explain, implying an unknown cause.

for an inscrutable motive

This suggests that the reason is not easily understood, implying a hidden or obscure intention.

arbitrarily

This alternative denotes the action was based on random choice or personal whim, rather than any reason.

out of the blue

This idiom indicates the event occurred unexpectedly and without any prior indication or reason.

FAQs

How can I use "for an unknown reason" in a sentence?

You can use "for an unknown reason" to indicate that the cause of an event or action is not known or understood. For example: "The meeting was canceled "for an unknown reason"."

What are some alternatives to "for an unknown reason"?

Some alternatives include "for reasons unknown", "inexplicably", or "mysteriously". The best choice depends on the specific context and the nuance you want to convey.

Is "for an unknown reason" formal or informal?

"For an unknown reason" is appropriate in both formal and informal writing. It's a neutral phrase that doesn't carry strong connotations of either formality or informality.

What is the difference between "for an unknown reason" and "for no reason"?

"For an unknown reason" suggests that there is a reason, but it is not known. "For no reason" implies that there is no reason or justification. The choice depends on whether you believe there is an underlying cause, even if it's not apparent.