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
most challenging about
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "most challenging about" is correct and usable in written English.
You can use it when discussing the difficulties or obstacles related to a specific topic or situation. Example: "The most challenging about this project is managing the tight deadlines while ensuring quality work."
✓ Grammatically correct
News & Media
Science
Alternative expressions(20)
at its most challenging
challenging about
most challenging
the most challenging
most challenging to
most passionate about
most spoken about
most worrisome about
caring most about
the most challenging phase
most talked about
most concerned about
most informed about
most challenging endeavor
i am most worried about
the most talked-about
most appealing about
most memorable about
i am most excited about
about how challenging it is to
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
17 human-written examples
For me to make "The Reluctant Fundamentalist" was very much a way to seek a portrait of both sides with the same love, anguish and questioning.What did you find most challenging about making the film?It was pretty challenging adapting the screenplay.
News & Media
T.T.: What is most challenging about modeling?
News & Media
What was most challenging about the role?
News & Media
What was the most challenging about working in Kashmir?
News & Media
What do you find most challenging about writing together?
News & Media
What's been most challenging about running your company?
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
43 human-written examples
During each session there will also be two key questions asked based upon the Dolby et al[ 6] study: " What is the most positive thing about your baby?" " What is the most challenging thing about your baby?" In addition, questions on sleeping and feeding will be asked and based upon these answers and general discussion, two key issues will be identified for the parent and therapist.
Science
One participant, Eduardo, a Civil Engineering student from Mexico, found that the most challenging thing about the event was "picturing the people we were talking about in the study case, so we never forgot that even though it was an hypothetical challenge, it was real people". The information videos and case study specialists were vitally important for the teams.
News & Media
Rowley: What's the most challenging thing about being a cofounder, and how do you meet those challenges?
News & Media
What was the most challenging thing about Stag's Leap?
News & Media
What is the most challenging thing about running in Uganda?
News & Media
Expert writing Tips
Best practice
Consider replacing the phrase with alternatives like "biggest challenge concerning" or "greatest difficulty with regard to" /s/greatest+difficulty+with+regard+to for a more formal or nuanced tone.
Common error
Avoid overusing the phrase "most challenging about" when a simpler adjective might suffice. For example, instead of saying "The most challenging about the task was its length", you could say "The task's length made it arduous".
Source & Trust
85%
Authority and reliability
4.1/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "most challenging about" functions as an adjectival phrase that modifies a noun, specifying the greatest difficulty or obstacle related to that noun. As confirmed by Ludwig AI, this is a correct and usable expression.
Frequent in
News & Media
70%
Science
20%
Formal & Business
10%
Less common in
Wiki
0%
Encyclopedias
0%
Reference
0%
Ludwig's WRAP-UP
The phrase "most challenging about" serves to pinpoint the most significant difficulty or obstacle related to a particular topic. As Ludwig AI states, this expression is grammatically correct and can be used confidently in writing. While the frequency of its occurrence is uncommon, it appears across various contexts, including News & Media, Science, and Formal & Business settings. When aiming for variety, consider swapping "most challenging about" with alternatives such as "biggest challenge concerning" or "greatest difficulty with regard to" /s/greatest+difficulty+with+regard+to. Remember to clearly define the subject of difficulty and avoid overuse to keep your writing sharp and concise.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
biggest challenge concerning
Replaces 'most challenging' with 'biggest challenge' and 'about' with 'concerning'.
greatest difficulty with regard to
Substitutes 'most challenging' with 'greatest difficulty' and 'about' with 'with regard to' for a more formal tone.
main obstacle in relation to
Uses 'main obstacle' instead of 'most challenging' and 'in relation to' in place of 'about'.
primary hurdle regarding
Replaces 'most challenging' with 'primary hurdle' and 'about' with 'regarding'.
toughest aspect concerning
Uses 'toughest aspect' in place of 'most challenging' and 'concerning' instead of 'about'.
most problematic with respect to
Substitutes 'challenging' with 'problematic' and 'about' with 'with respect to'.
major impediment relating to
Replaces 'most challenging' with 'major impediment' and 'about' with 'relating to'.
chief complication involving
Uses 'chief complication' instead of 'most challenging' and 'involving' in place of 'about'.
key struggle in the matter of
Substitutes 'most challenging' with 'key struggle' and 'about' with 'in the matter of'.
significant issue connected to
Replaces 'most challenging' with 'significant issue' and 'about' with 'connected to'.
FAQs
How can I use "most challenging about" in a sentence?
The phrase "most challenging about" is used to introduce the biggest difficulty or obstacle associated with a particular subject or task. For example, "The most challenging about learning a new language is mastering the grammar."
What are some alternatives to "most challenging about"?
You can use alternatives such as "biggest challenge concerning", "greatest difficulty with regard to" /s/greatest+difficulty+with+regard+to, or "main obstacle in relation to" /s/main+obstacle+in+relation+to depending on the context and desired level of formality.
Is "most challenging about" grammatically correct?
Yes, the phrase "most challenging about" is grammatically correct and commonly used in English to express the biggest difficulty or hurdle associated with something. As Ludwig AI confirms, the phrase is correct and usable in written English.
What's the difference between "most challenging about" and "most challenging thing about"?
While both phrases are similar, "most challenging about" focuses more directly on the aspect or quality causing the difficulty, whereas "most challenging thing about" emphasizes the specific element or task that presents the biggest hurdle. The nuance depends on whether you're highlighting an abstract aspect or a concrete element.
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
85%
Authority and reliability
4.1/5
Expert rating
Real-world application tested