for reasons unknown

USAGE SUMMARY

The phrase "for reasons unknown" is correct and usable in written English.
It can be used when referring to a situation or outcome that lacks a clear explanation or understanding. Example: "The project was delayed for reasons unknown, leaving the team puzzled about the cause."

✓ Grammatically correct

News & Media

Human-verified examples from authoritative sources

Exact Expressions

56 human-written examples

For reasons unknown, she adopted the name Hellé Nice.

The New York Times

For reasons unknown, the administered hormone has a unique effect.

The New York Times - Magazine

FOR reasons unknown, Florida didn't agree with little Noah Tovar.

The New York Times

"Crumbs" seeks, for reasons unknown, to redress that omission.

The New York Times - Arts

He believed, for reasons unknown, that Iran would do nothing to help its proxies.

The New York Times

Sadly, the Catholic church, for reasons unknown, is not part of this venture.

The Guardian - Opinion

For reasons unknown, he was shot in the yard the following morning.

The New Yorker

Millenniums ago, not one but two shape-changing aliens came to earth for reasons unknown.

The New York Times - Books

For reasons unknown, the £300m loan from Blue Blade was repaid in less than a year.

The Guardian - Business

For reasons unknown, the blockfront was sold for development in two segments in 1896.

The New York Times

DeGraff fled for a while, but eventually returned to town for reasons unknown and was captured.

The New York Times

Expert writing Tips

Best practice

When employing the phrase, ensure it doesn't create ambiguity. Follow it with contextual details to avoid confusing the reader.

Common error

Avoid using "for reasons unknown" as a filler when you could reasonably investigate and provide an explanation. Overusing it can make your writing seem lazy or uninformed.

Linguistic Context

The phrase "for reasons unknown" functions as an adverbial phrase, modifying a verb or clause to indicate a lack of knowledge or explanation for a particular event or situation. According to Ludwig, the phrase is grammatically correct.

Expression frequency: Very common

Frequent in

News & Media

81%

Science

7%

Wiki

3%

Less common in

Formal & Business

2%

Encyclopedias

0%

Social Media

0%

Ludwig's WRAP-UP

In summary, "for reasons unknown" is a grammatically sound and frequently used phrase that serves to indicate a lack of explanation or understanding. Ludwig AI confirms its correctness. Its prevalence in news and media highlights its utility in reporting factual events without speculating on underlying causes. While versatile, it should be used judiciously to avoid appearing uninformed. Alternatives like "for unspecified reasons" or "mysteriously" can offer nuanced variations in meaning. It is a neutral register phrase.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

for causes unknown

Emphasizes the absence of identifiable causes.

for purposes unknown

Focuses on the obscurity of the intentions or aims.

for motives unknown

Highlights the lack of understanding of underlying motivations.

for reasons unnamed

Stresses that the reasons have not been explicitly stated.

for reasons undisclosed

Indicates that the reasons are deliberately kept secret.

for reasons unspecified

Suggests that the reasons are not detailed or defined.

for reasons undetermined

Highlights that the reasons are still under investigation or not yet established.

for reasons unbeknownst to

Adds a personal perspective, indicating the speaker's lack of knowledge.

for reasons unexplained

Focuses on the absence of an explanation.

mysteriously

Implies an element of mystery or intrigue.

FAQs

How to use "for reasons unknown" in a sentence?

Use "for reasons unknown" to indicate that the cause or explanation for something is not known or has not been revealed. For instance, "The project was suddenly canceled, "for reasons unknown"".

What can I say instead of "for reasons unknown"?

You can use alternatives like "for unspecified reasons", "for unexplained reasons", or simply "mysteriously" depending on the context.

Is it appropriate to use "for reasons unknown" in formal writing?

Yes, "for reasons unknown" is generally acceptable in formal writing when you genuinely lack an explanation. However, consider whether a more specific or researched explanation could be provided instead.

What's the difference between "for reasons unknown" and "for reasons unstated"?

"For reasons unknown" implies that the reasons are genuinely not known, while "for reasons unstated" suggests that the reasons exist but have not been explicitly communicated. The choice depends on whether the reason is actually unknown or just not shared.