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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
clear as mud
Grammar usage guide and real-world examplesUSAGE SUMMARY
"clear as mud" is a correct and usable expression in written English.
It is typically used to describe a situation that is confusing or difficult to understand. For example, "The instructions for how to use the new software were clear as mud."
✓ Grammatically correct
News & Media
Science
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
Clear as mud, right?
News & Media
This article is as clear as mud.
Academia
Clear as mud, in other words.
News & Media
As clear as mud, that is.
News & Media
Whether that will really help is as clear as mud.
News & Media
Clegg said the Conservative position was "as clear as mud".
News & Media
It sounds like things are currently clear as mud.
News & Media
Clear as mud Fixing common affairs ReprintsThe proposal was surprisingly well received.
News & Media
Two-tier money market fund reform is as clear as mud.
News & Media
Clear as mud Fixing common affairs ReprintsBig global carmakers reckon this is romantic tosh.
News & Media
However, the procedures for doing this remain "as clear as mud", says another lawyer.
News & Media
Expert writing Tips
Best practice
Use "clear as mud" when you want to humorously emphasize a lack of understanding or clarity. It's often more impactful than simply saying something is "unclear".
Common error
Avoid using "clear as mud" in formal or serious contexts where clarity is paramount. It injects humor and informality that might be inappropriate.
Source & Trust
86%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
Clear as mud functions as a simile, comparing something's lack of clarity to the opacity of mud. The phrase is used to express that something is confusing and difficult to understand. As Ludwig AI indicates, it is correct and usable in written English.
Frequent in
News & Media
60%
Science
20%
Formal & Business
10%
Less common in
Encyclopedias
5%
Wiki
3%
Reference
2%
Ludwig's WRAP-UP
In summary, the phrase "clear as mud" is a simile used to describe something that is confusing or difficult to understand. It is grammatically correct and very common, as confirmed by Ludwig AI. It's primarily found in news and media, and scientific contexts, carrying a tone of humorous frustration. When writing, use it in informal settings to emphasize a lack of clarity in a lighthearted way. While there are many alternative expressions, such as "unintelligible" or "incomprehensible", "clear as mud" provides a unique, idiomatic way to express confusion.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
unintelligible
Direct synonym; emphasizes the lack of comprehensibility.
incomprehensible
Similar to unintelligible; highlights the inability to grasp the meaning.
difficult to understand
A straightforward way of expressing a lack of clarity.
ambiguous
Suggests that something has multiple possible interpretations, causing confusion.
obscure
Indicates that something is hidden or not easily apparent.
opaque
Implies a lack of transparency, making understanding difficult.
murky
Similar to opaque, suggesting a lack of clarity or transparency.
enigmatic
Implies a mysterious or puzzling quality.
perplexing
Describes something that causes confusion or bewilderment.
like wading through treacle
An idiomatic expression conveying something is slow, laborious, and difficult to understand.
FAQs
How can I use "clear as mud" in a sentence?
You can use "clear as mud" to describe anything that is confusing or difficult to understand. For example, "The instructions were as "clear as mud", so I couldn't assemble the furniture".
What's a more formal alternative to "clear as mud"?
If you need a more formal way to express that something is unclear, consider using phrases like "ambiguous", "incomprehensible", or "difficult to understand".
Is "clear as mud" grammatically correct?
Yes, "clear as mud" is a grammatically sound simile. It follows the structure of "as [adjective] as [noun]" and is widely accepted in English.
What does "clear as mud" actually mean?
The phrase "clear as mud" is an ironic expression. It means the opposite of being clear; it means something is very confusing and difficult to understand.
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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
86%
Authority and reliability
4.5/5
Expert rating
Real-world application tested