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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
plain as a
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "plain as a" is correct and usable in written English. You can use it to describe something that is very clear or obvious. An example is: "The answer was plain as a nose on your face." Alternative expressions include "clear as day" and "obvious as can be."
✓ Grammatically correct
News & Media
Science
Encyclopedias
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
52 human-written examples
"I'm as plain as a loaf of bread".
News & Media
Dang Duc Thuc said the matter was as plain as a plate of white rice.
News & Media
It is as terse and plain as a punch in the gut.
News & Media
Sometimes a modern school or hospital — decent, but low and plain as a shed.
News & Media
The president of Russia is as plain as a glass of tea.
News & Media
The plain as a whole is composed of deep layers of sediment and is extremely flat and, in places, swampy.
Encyclopedias
Human-verified similar examples from authoritative sources
Similar Expressions
8 human-written examples
Sometimes, the real issue – the plain-as-a-pikestaff, nose-on-your-face big issue – sits elsewhere, in the column headed "gender".
News & Media
Was it just a year later that adopters of the inflated bowler, fedora or toque traded in those zany styles for the comparatively tame, plain-as-a-flapjack beret?
News & Media
The Family Meal: Home Cooking with Ferran Adria (Phaidon) is a plain-as-a-pikestaff guide to simple cuisine (spaghetti with tomato and basil, salt cod with braised vegetables) that features 1,500 colour illustrations and step-by-step instructions, as though for slightly dim children.
News & Media
But for pure and simple boosterism, it's hard to beat the chant at Johns Hopkins University: Hi-lo, Hi-lee, It's plain as A-B-C, If anyone's going to win today, It's we, we, we!
News & Media
The road lies through an open plain as far as can be seen.
Academia
Expert writing Tips
Best practice
Use "plain as a" to emphasize that something is very obvious or easy to understand. It's most effective when comparing to something familiar to your audience.
Common error
While "plain as a" is widely understood, overuse can make your writing sound unoriginal. Consider fresher, more vivid comparisons to keep your writing engaging.
Source & Trust
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "plain as a" functions as a simile, used to create a comparison that emphasizes the obviousness or simplicity of something. It's a common way to make a statement more emphatic, as shown in Ludwig's examples.
Frequent in
News & Media
45%
Science
30%
Encyclopedias
15%
Less common in
Formal & Business
5%
Wiki
3%
Reference
2%
Ludwig's WRAP-UP
In summary, "plain as a" is a simile used to emphasize the clarity or obviousness of something. According to Ludwig, it's grammatically correct and very commonly used, particularly in News & Media and Science. While effective for making a point straightforward, it's advisable to avoid overuse to keep your writing original. Remember, its effectiveness relies on comparing to something well-known to your audience.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
clear as day
Changes the metaphor to emphasize visual clarity.
crystal clear
Uses the metaphor of crystal to denote extreme clarity.
as clear as glass
Changes the simile to emphasize visual clarity, similar to "crystal clear".
obvious as can be
Focuses on the undisputable nature of something.
simple as ABC
Changes the simile to emphasize how easy something is.
evident
A single-word synonym emphasizing clarity.
unmistakable
Highlights the lack of ambiguity.
patent
Emphasizes that something is easily recognizable.
easy to see
Simple phrasing indicating clear visibility or understanding.
readily apparent
Highlights the quick and easy understanding of something.
FAQs
How can I use "plain as a" in a sentence?
Use "plain as a" to emphasize the obviousness of something by comparing it to a well-known object or concept. For example, "The answer was "plain as day"".
What are some alternatives to saying "plain as a"?
You can use alternatives like "clear as day", "obvious as can be", or "crystal clear" to convey the same meaning.
Is it better to say "plain as a" or "simple as a"?
While both convey ease of understanding, "plain as a" focuses more on obviousness, whereas "simple as a" emphasizes lack of complexity. Choose based on the specific nuance you want to convey.
When is it inappropriate to use the phrase "plain as a"?
Avoid using "plain as a" in very formal or technical contexts where a more precise and less figurative expression is expected.
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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
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested