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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
unperceived
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "unperceived" is correct and usable in written English.
It can be used to describe something that is not noticed or recognized by someone. Example: "The beauty of the landscape remained unperceived by the hurried travelers."
✓ Grammatically correct
Encyclopedias
Science
News & Media
Alternative expressions(8)
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
36 human-written examples
If one were to abstract the set of all such properties from the object, however, nothing would be left over there would be no presumed Lockean "substratum" that supports these properties and that itself is unperceived.
Encyclopedias
Shankara, however, did distinguish between three senses of being: the merely illusory (pratibhasika), the empirical (vyavaharika; which has unperceived existence and pragmatic efficacy), and transcendental being of one, indeterminate brahman.
Encyclopedias
Lincoln was puzzled, but, after a three-hour meeting with a few of the senators, he felt that he understood their complaint: "They seemed to think that when he [Lincoln] had in him any good purposes, Mr. S[eward] contrived to suck them out of him unperceived".
News & Media
Yet the most virulent criticism of policy makers has come from those insisting that they are doing too much — that deficits are a terrible threat (somehow unperceived by the bond market), that the actions of central banks are excessive, even insane.
News & Media
He argues that because ideas don't exist unperceived there is no significant sense in which the ideas of memory continue to exist when we are not thinking about them.
Science
Second, condition (ii): Sense data theorists believe that the things we are directly aware of in perception are dependent on the mind of the perceiver — they cannot exist unperceived.
Science
Berkeley It is impossible for anything to exist unperceived.
Science
To speak about the tomato's existing unperceived in the next room thus does not entail that it is unperceivable.
Encyclopedias
That suggests these areas have some crucial, but as yet unperceived, function.There were differences, too, of course.
News & Media
That means they may obey hitherto unperceived extensions of the laws of physics.
News & Media
Maybe mad-cow disease and its human analogues are merely the unfortunate by-products of some crucial, but as yet unperceived, mechanism.
News & Media
Expert writing Tips
Best practice
Place "unperceived" after the noun (post-positive) in descriptive literary contexts for a more rhythmic or sophisticated effect, such as "changes accumulate unperceived".
Common error
Do not use "unperceived" when you actually mean "imperceptible". Use "unperceived" for something that was simply not noticed (though it could have been) and "imperceptible" for something that is impossible to detect because it is too small or subtle.
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95%
Authority and reliability
4.9/5
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Real-world application tested
Linguistic Context
The word "unperceived" functions as a primary adjective, derived from the prefix 'un-' and the past participle of 'perceive'. In the examples provided by Ludwig, it often operates as a predicative adjective (e.g. "...itself is "unperceived"") or a post-positive modifier following the noun it describes, which is a common trait in academic and philosophical prose.
Frequent in
Science
45%
Encyclopedias
30%
News & Media
25%
Less common in
Social Media
5%
Wiki
10%
Formal & Business
15%
Ludwig's WRAP-UP
In conclusion, "unperceived" is a sophisticated adjective primarily employed in academic, philosophical and high-level journalistic writing. According to data from Ludwig, it is most frequently used to describe phenomena or objects that exist or occur without human awareness or observation. It is particularly prevalent in epistemological texts—such as those discussing Berkeley or Locke—to explore the boundary between existence and perception. While synonymous with "unnoticed", it carries a more clinical and formal weight. Writers should prefer "unperceived" when discussing subtle physical laws, historical shifts that went unremarked at the time or deep philosophical concepts regarding the mind-independent world.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
unnoticed
More common in everyday language and suggests a simple failure to see or hear something.
unobserved
Often used in scientific or formal contexts to indicate that no witness or instrument recorded an event.
undetected
Suggests that something was hidden or that a specific search failed to find it.
unseen
Specifically refers to the visual sense and can imply being hidden from view.
overlooked
Implies a lack of attention or a failure to realize the importance of something.
unrecognized
Indicates that while something may have been seen, its identity or significance was not understood.
unnoted
Suggests that something was not significant enough to be recorded or commented upon.
unremarked
Focuses on the fact that no one made a comment or 'remark' about the subject.
insensible
A more archaic or technical term meaning incapable of being felt or perceived by the senses.
disregarded
Implies an intentional act of ignoring rather than a passive failure to notice.
FAQs
How to use "unperceived" in a sentence?
You can use "unperceived" as an adjective to describe something not noticed. For example, Ludwig provides the snippet: "The end of the Roman Empire of the West passed almost "unperceived"."
What is the difference between "unperceived" and unnoticed?
While both describe things not seen, "unperceived" is more formal and often used in philosophy regarding the nature of existence. "unnoticed" is better for general everyday occurrences like a person walking into a room without being seen.
Is it correct to say "unperceived by the mind"?
Yes, this is a very common philosophical construction. Ludwig AI confirms that "unperceived" is frequently used in epistemological discussions to denote things existing independently of awareness.
What's a formal synonym for "unperceived"?
A strong formal synonym is "unobserved" or "undetected" depending on whether the context is scientific or general.
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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
95%
Authority and reliability
4.9/5
Expert rating
Real-world application tested