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 grievous error
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "a grievous error" is correct and usable in written English.
It can be used to describe a serious mistake or wrongdoing, often with significant consequences. Example: "The committee acknowledged that the decision to approve the project was a grievous error that could have lasting repercussions."
✓ Grammatically correct
News & Media
Formal & Business
Alternative expressions(20)
a serious mistake
a significant blunder
a grave mistake
a terrible blunder
a costly mistake
a big mistake
a critical error
a fatal flaw
a major oversight
a significant miscalculation
a substantial error
a gross error
a grave error
a terrible error
a tremendous error
a dire error
a severe error
a serious error
a grievous wrong
a detailed error
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
26 human-written examples
This was a grievous error.
News & Media
But we can prevent a grievous error from being done".
News & Media
"In my previous email on this subject, I made a grievous error," McEwen said.
News & Media
I believe that The Times has made a grievous error in judgment by publishing this satire.
News & Media
Mr. Wythe wrote, Nate is "committing a grievous error by focusing on the final percentages and ignoring the turnout levels.
News & Media
About the miscommunication with the affiliates, Jeffrey Schneider, the spokesman for ABC News, said: "It was a grievous error.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
31 human-written examples
I believe it is a grievous mistake".
News & Media
That would be a grievous mistake.
News & Media
But underdoing it would have been a grievous fault.
News & Media
Then Raffaello De Ruggieri, a lawyer who considered the depopulation campaign a grievous mistake, moved in.
News & Media
One defense lawyer, Tai H. Park, told jurors that Mr. Banki had applied himself "like very few others do," and tried to do everything "the right way" until he was "set off his path by a misguided prosecution fraught with grievous error".
News & Media
Expert writing Tips
Best practice
Use "a grievous error" when you want to emphasize the seriousness and potentially damaging consequences of a mistake. It adds a formal and somewhat grave tone to your writing.
Common error
Avoid using "a grievous error" in casual conversations or informal writing. Its formal tone can sound unnatural or overly dramatic in everyday situations. Opt for simpler alternatives like "a big mistake" or "a bad error" in less formal contexts.
Source & Trust
89%
Authority and reliability
4.6/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "a grievous error" functions as a noun phrase, typically serving as the object of a verb or preposition. As Ludwig AI confirms, it is grammatically correct and widely used. For example, "It was a grievous error." or "He acknowledged a grievous error in his decision-making."
Frequent in
News & Media
89%
Formal & Business
6%
Wiki
3%
Less common in
Science
1%
Reference
0%
Encyclopedias
0%
Ludwig's WRAP-UP
In summary, "a grievous error" is a grammatically correct noun phrase used to describe a serious mistake with significant consequences. As Ludwig AI states, it is commonly found in news and media contexts and possesses a neutral but formal register. While effective in conveying the gravity of a situation, be mindful of overuse in casual settings. Consider alternatives such as "a serious mistake" or "a grave mistake" depending on the specific nuance you wish to convey.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
a serious mistake
Emphasizes the severity of the mistake but lacks the formal tone of "grievous".
a grave mistake
Similar in tone and meaning, but uses "grave" instead of "grievous".
a critical error
Highlights the fact that the mistake happened at a key moment or decision.
a terrible blunder
Focuses on the clumsiness of the error, implying a lack of skill or care.
an inexcusable mistake
Indicates that there's no apparent reason for that mistake to happen.
a fatal flaw
Highlights the potentially disastrous consequences of the error.
a costly mistake
Emphasizes the negative impact or the expense that occurred because of a mistake.
an egregious blunder
Indicates the mistake was outstandingly bad, or shocking.
a major oversight
The emphasis is on the fact that something has not been taken into consideration.
a significant miscalculation
The mistake consists of an incorrect mathematical calculation, estimate, or assessment.
FAQs
What does "a grievous error" mean?
The phrase "a grievous error" refers to a serious or terrible mistake, often one with significant consequences. It implies that the error is not just a simple mistake, but something that causes considerable harm or distress.
How can I use "a grievous error" in a sentence?
You can use "a grievous error" to describe a serious mistake made by someone or something. For example: "The general admitted that the invasion was "a grievous error" in judgment", or "Failing to secure the data was "a grievous error" that cost the company millions."
What are some synonyms for "a grievous error"?
Alternatives to "a grievous error" include "a serious mistake", "a grave mistake", "a terrible blunder", or "a costly mistake". The best choice depends on the specific context and the nuance you want to convey.
Is it appropriate to use "a grievous error" in casual conversation?
While grammatically correct, "a grievous error" is more suited for formal writing or serious discussions. In casual conversation, it might sound overly dramatic or stilted. Simpler phrases like "a big mistake" or "a bad error" are generally more appropriate.
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.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
89%
Authority and reliability
4.6/5
Expert rating
Real-world application tested