Used and loved by millions
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
for no obvious reason
Grammar usage guide and real-world examplesUSAGE SUMMARY
"for no obvious reason" is correct and usable in written English.
You can use this phrase when you want to explain why or how something happened, but you don't know the exact reason why. Example: She began to cry for no obvious reason.
✓ Grammatically correct
News & Media
Science
Academia
Alternative expressions(20)
for no discernible reason
for no apparent cause
inexplicably
for no apparent reason
for no evident reason
without any clear explanation
for reasons unknown
for no good reason
arbitrarily
unaccountably
out of the blue
for no demonstrable reason
for no substantial reason
for no tangible reason
for no understandable reason
for no obvious purpose
for no discernable reason
for no apparent motive
for no ostensible reason
for no visible reason
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
60 human-written examples
For no obvious reason.
News & Media
It had exploded, for no obvious reason.
News & Media
And for no obvious reason I could make out.
News & Media
For no obvious reason, he risks the entire game.
News & Media
Someone smiling at me for no obvious reason.
News & Media
This is negative discrimination for no obvious reason.
News & Media
In many cases, patients get an anti-depressant for no obvious reason".
News & Media
The ring is a never-ending nightmare to which people are drawn for no obvious reason.
News & Media
Ashley Giles was bowling to Shivnarine Chanderpaul and for no obvious reason switched ends.
News & Media
Anxiety seems to have them by the throat for no obvious reason.
News & Media
"I do it for Graydon [Carter, editor of Vanity Fair]," she adds, for no obvious reason.
News & Media
Expert writing Tips
Best practice
Use "for no obvious reason" to clearly indicate that an event or action occurred without a readily apparent cause, signaling to the reader that no explanation will be provided or that the reason remains unknown.
Common error
Avoid relying on "for no obvious reason" too frequently, as it can suggest a lack of thorough investigation or analysis. Try to provide at least some context or potential factors, even if the ultimate reason remains unclear.
Source & Trust
88%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "for no obvious reason" functions as an adverbial phrase, modifying a verb or clause to indicate that an action or event occurred without a clear or apparent cause. Ludwig AI indicates that this phrase is correct and usable in written English.
Frequent in
News & Media
75%
Science
15%
Academia
5%
Less common in
Encyclopedias
1%
Wiki
1%
Formal & Business
1%
Ludwig's WRAP-UP
In summary, the phrase "for no obvious reason" is a versatile adverbial phrase used to indicate a lack of clear cause or explanation for an event. Ludwig AI confirms its grammatical correctness and usability. It is frequently found in news articles and general writing, making it suitable for various contexts. While effective, it's important to avoid overuse and provide some context when possible. Alternatives such as "for no apparent reason" or "inexplicably" can add variety to your writing.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
for no apparent reason
Changes 'obvious' to 'apparent', suggesting the reason isn't easily seen or understood.
for no discernible reason
Replaces 'obvious' with 'discernible', indicating the reason is not easily detectable.
for no evident reason
Substitutes 'obvious' with 'evident', highlighting the lack of clear evidence for the reason.
without any clear explanation
Uses a more descriptive phrase to convey the absence of a straightforward explanation.
for reasons unknown
Emphasizes that the reasons are not known or have not been revealed.
inexplicably
Uses an adverb to indicate that something cannot be explained.
for no good reason
Implies the action lacks a justifiable or sensible cause.
arbitrarily
Suggests the action was based on random choice or personal whim, rather than logic.
unaccountably
Highlights the lack of accountability or explanation for the event.
out of the blue
Indicates the event was sudden and unexpected, with no preceding signs.
FAQs
How can I rephrase "for no obvious reason" to sound more formal?
In more formal contexts, consider using phrases like "for no discernible reason", "for no apparent cause", or "inexplicably" to maintain a sophisticated tone.
When is it appropriate to use "for no obvious reason" in writing?
It's appropriate when describing events or behaviors where the cause is genuinely unknown or not immediately apparent. It signals to the reader that the lack of explanation is intentional and not due to oversight.
What's the difference between "for no obvious reason" and "for no apparent reason"?
The phrases are very similar. "For no obvious reason" implies the cause isn't easily noticed or understood, while "for no apparent reason" suggests the cause isn't outwardly visible or evident. They are often interchangeable.
Is it acceptable to start a sentence with "For no obvious reason"?
Yes, starting a sentence with "For no obvious reason" is grammatically correct and can be effective for emphasis or to immediately highlight the lack of a clear cause. However, vary your sentence structure to avoid monotony.
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Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
88%
Authority and reliability
4.5/5
Expert rating
Real-world application tested