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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
underlined on
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "underlined on" is not correct in standard written English.
It is not a commonly used expression and may confuse readers. A more appropriate phrase would be "underlined in" or "highlighted in." Example: "The key terms are underlined in the document for emphasis."
⚠ May contain grammatical issues
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
50 human-written examples
The frailty of the participants was underlined on Wednesday when one man, 83-year-old Lee Kun-Su, was forced to pull out at the last minute because of health issues.
News & Media
The impact of the Co-operative Bank's troubles on its one-time full owner, the Co-operative Grounderlinedderlined on Monday as the wider group was forced into a complex restructuring of a relatively minor bond.
News & Media
The weakness in the union-Labour relationship was underlined on Monday by a new poll showing only one in eight say they will join Labour if asked and only three in 10 members of Unite would contribute to the union's political fund if they were asked.
News & Media
This isolation was underlined on Monday.
News & Media
Mr. de Guindos underlined on Tuesday the importance of Santander.
News & Media
Military fury was underlined on Friday at a meeting of the army high command.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
10 human-written examples
Our results further suggest that efforts to expand PV installation in equatorial developing countries may benefit greatly from policies designed to make low cost finance more widely available, which underlines on-going efforts to "de-risk" low carbon investments.
Science
That any roadside zoo would ask visitors to choose between advocating for animals and entering their zoo only underlines on which side of the fence I would rather be.
News & Media
They underline, on the other hand, the practical relevance of considering natural variability of the protease complement among L. decemlineata target populations, eventually determinant in the success or failure of cystatin-based control strategies on a large-scale basis.
Science
It should be underlined that on average following training the pre-delivery phase increased from 2 to 4 min.
Science
This approach should be based on existing standards built around previous experience and benefit from nowadays survey studies that underline on-site problems.
Science
Expert writing Tips
Best practice
Instead of using "underlined on", opt for grammatically correct alternatives such as "underlined in" or "highlighted in" to ensure clarity and adherence to standard English conventions.
Common error
Avoid using "on" with "underlined". The correct preposition is typically "in". For example, say "The key points are underlined in the document", not "The key points are underlined on the document".
Source & Trust
84%
Authority and reliability
2.8/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "underlined on" functions as a passive construction where something has been marked for emphasis, though its usage is often considered grammatically incorrect. As pointed out by Ludwig AI, it's better to use "underlined in".
Frequent in
News & Media
62%
Science
31%
Wiki
5%
Less common in
Formal & Business
2%
Academia
0%
Encyclopedias
0%
Ludwig's WRAP-UP
In summary, while the phrase "underlined on" appears in various sources, Ludwig AI identifies it as grammatically incorrect. A more appropriate choice is to use "underlined in" or alternatives like "highlighted in" and "emphasized in" to ensure grammatical correctness. Its occurrence is relatively common across news and media, but avoiding it in formal writing contexts is advisable to maintain clarity and professionalism.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
underlined in
Uses the preposition "in" instead of "on" to indicate where the emphasis is placed.
highlighted in
Replaces "underlined" with "highlighted", another way to show emphasis, using the preposition "in".
emphasized in
Uses "emphasized" to convey importance, with the preposition "in".
stressed in
Employs "stressed" to signify importance, with the preposition "in".
pointed out in
Uses "pointed out" to indicate something brought to attention, with the preposition "in".
indicated in
Replaces "underlined" with "indicated", suggesting a showing or pointing out with the preposition "in".
noted in
Uses "noted" to convey that something was observed or mentioned with the preposition "in".
brought to light in
Replaces "underlined" with "brought to light", indicating revealing something with the preposition "in".
focused on
Uses "focused on" to mean attention is given to something directly.
drawn attention to
Implies emphasis by directing focus towards something.
FAQs
Is "underlined on" grammatically correct?
No, "underlined on" is not considered grammatically correct in standard English. The more appropriate preposition to use with "underlined" is "in". For example, it should be "underlined in the text".
What can I use instead of "underlined on"?
Instead of "underlined on", you can use phrases like "underlined in", "highlighted in", or "emphasized in" to convey the same meaning with better grammatical accuracy.
Which is correct, "underlined on" or "underlined in"?
"Underlined in" is the correct and grammatically accepted phrase. "Underlined on" is generally considered incorrect.
How do I properly use "underlined in" in a sentence?
You can use "underlined in" to indicate where emphasis is placed within a document or text. For example, "The main points are underlined in the report for clarity".
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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
2.8/5
Expert rating
Real-world application tested