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
a unprotected
Grammar usage guide and real-world examplesUSAGE SUMMARY
"a unprotected" is not correct in written English. It can be used in contexts where "unprotected" is intended to describe a noun, but it should be preceded by "an" instead of "a." Example: "It is important to avoid an unprotected environment." Alternative expressions include "a vulnerable" and "an unsafe."
⚠ May contain grammatical issues
News & Media
Science
Wiki
Formal & Business
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
2 human-written examples
SCRs are sporadically emitted, and in very rare but possible events, their fluence can be so high to be lethal to a unprotected crew.
Science
Never leave your gold vault/gold mines in a unprotected area.
Wiki
Human-verified similar examples from authoritative sources
Similar Expressions
56 human-written examples
Changing a password on an unprotected site could still leave people open to data theft, he said.
News & Media
According to security vendor Sophos, there is a 50% chance an unprotected Microsoft Windows PC will be compromised within 12 minutes of going online.
News & Media
In a matter of seconds, an unprotected person one foot away from a single freshly removed spent fuel assembly would receive a lethal dose of radiation within seconds.
News & Media
A Washington state internet provider left an unprotected server online without a password, exposing network schematics, passwords and other sensitive files for at least six months.
News & Media
Bob Diachenko, an independent security researcher, found an unprotected Elasticsearch database containing the applications on January 11, a little under a month after the database was first exposed.
News & Media
The only other person known to have lived through an unprotected fall was a 7-year-old, Roger Woodward of Niagara Falls, N.Y.
News & Media
Sending account credentials over an unprotected network is a bad idea, says Michael Owen, head of security management at security consultancy and penetration tester IRM.
News & Media
To address this problem, a lysine residue with an unprotected carboxylic acid group was inserted into the dendron branches.
Her later travels would be as an "unprotected" woman, without a chaperone or sponsor an unusual practice.
Wiki
Expert writing Tips
Best practice
Check your writing for article-adjective agreement during the editing phase, as this is a frequent typo in fast-paced digital drafting.
Common error
Do not assume that all words starting with 'u' take the article 'a'. While 'a university' is correct because it starts with a consonant 'y' sound, "unprotected" starts with a vowel sound and must be preceded by 'an'.
Linguistic Context
Grammatically, "a unprotected" is an attempted determiner-adjective phrase. However, as Ludwig AI notes, it is a non-standard construction. In standard English, the indefinite article 'an' must precede any word starting with a vowel sound to ensure phonetic flow. The few instances of this phrase in the Ludwig database are typically found in informal or unedited content.
Frequent in
News & Media
45%
Science
30%
Wiki
15%
Less common in
Formal & Business
5%
Encyclopedias
3%
Academic
2%
Ludwig's WRAP-UP
In conclusion, "a unprotected" is a grammatical error that should be avoided in all forms of writing. Ludwig AI data demonstrates that while this specific string appears in rare instances, reputable sources such as The New York Times and The Guardian exclusively use the correct form, "an unprotected". The error stems from a failure to recognize the vowel sound at the start of the adjective. For a more professional tone, writers should ensure they use "an" or opt for alternatives like "a vulnerable" or "an exposed" when describing a lack of defense.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
an unprotected
Corrects the indefinite article from 'a' to 'an' to match the vowel sound of the following word.
an exposed
Uses a synonym that implies being open to danger or scrutiny without defense.
a vulnerable
Shifts the focus to the state of being susceptible to harm or attack.
an unshielded
Specifically refers to the absence of a physical or metaphorical shield.
an unguarded
Indicates that no sentry or security measure is in place.
an unsafe
A broader term describing a condition where risk is present due to lack of protection.
a defenseless
Emphasizes the complete lack of means to resist an attack.
a susceptible
Suggests a high likelihood of being influenced or harmed by a particular factor.
an insecure
Often used in digital or psychological contexts to denote a lack of safety measures.
a risky
Describes the situation resulting from being unprotected rather than the state itself.
FAQs
Is it correct to say "a unprotected"?
No, it is grammatically incorrect. You should always use "an unprotected" because the word starts with a vowel sound.
What is the difference between "a unprotected" and "an unprotected"?
The difference is grammatical correctness. "an unprotected" follows the English rule of using 'an' before vowel sounds, whereas "a unprotected" is a mistake.
What can I say instead of "a unprotected"?
Depending on your context, you can use "a vulnerable", "an exposed", or "an unsafe".
Why do some people write "a unprotected"?
It is usually a typographical error or a result of writing quickly without proofreading. Most high-quality sources found in Ludwig automatically correct this to "an unprotected".
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.