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
challenging one
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "challenging one" is correct and usable in written English.
It can be used to refer to a task, situation, or problem that is difficult or requires significant effort to overcome. Example: "This project is a challenging one, but I believe we can succeed with teamwork and dedication."
✓ Grammatically correct
News & Media
Science
Academia
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
The efficiency of the method is demonstrated on challenging one- and two-dimensional benchmarks.
Challenging one question for its content is free.
News & Media
The issue is a notoriously challenging one for the S.E.C.
News & Media
They talk easily, chiding, laughing, challenging one another's sense of what's needed and what's possible.
News & Media
That being said, the process of inducing precise lesions remains a challenging one.
Academia
It's about challenging one another to be better.
News & Media
Jabba's position in relation to these greats is a privileged, but challenging one.
News & Media
But it is worth challenging one optimistic assumption, particularly because of its wider implications.
News & Media
Opponents are challenging one of the multiple service contracts, with Repsol, in the courts.
News & Media
"I'll be challenging one of my lads to be a hero and a Palace legend.
News & Media
"This is a really challenging one," Davis said.
News & Media
Expert writing Tips
Best practice
Use "challenging one" when you want to emphasize that something requires significant effort and skill to overcome. This phrase adds a touch of understatement, suggesting the difficulty is considerable but surmountable.
Common error
Avoid using "challenging one" in very casual conversations or informal writing. While grammatically correct, it can sound overly formal or stilted in everyday contexts. Consider using simpler alternatives like "tough" or "difficult" to maintain a natural tone.
Source & Trust
82%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "challenging one" primarily functions as an adjective phrase modifying a noun (often implied). As Ludwig AI confirms, it is grammatically correct. It serves to describe a task, situation, or problem that presents significant difficulty or requires considerable effort to overcome.
Frequent in
News & Media
45%
Science
30%
Academia
15%
Less common in
Wiki
5%
Encyclopedias
3%
Formal & Business
2%
Ludwig's WRAP-UP
In summary, "challenging one" is a grammatically correct and frequently used phrase to describe something that requires significant effort. According to Ludwig AI, it is suitable for a range of contexts, from news and media to academic writing. While versatile, it's best to avoid overusing it in very informal settings. Consider alternatives like "difficult task" or "tough assignment" depending on the context. As Ludwig's examples showcase, its purpose is to convey the level of difficulty associated with a task or situation, signaling the need for careful consideration and effort.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
difficult task
Replaces the adjective "challenging" with "difficult" and the noun "one" with "task" offering a more straightforward expression.
tough assignment
Uses "tough" instead of "challenging" and "assignment" in place of "one", implying a task that requires effort.
demanding situation
Substitutes "challenging" with "demanding" and "one" with "situation", highlighting the pressure and requirements of the context.
arduous undertaking
Employs more formal vocabulary, replacing "challenging" with "arduous" and "one" with "undertaking", suggesting a laborious effort.
complex problem
Focuses on the intricacy of the issue, using "complex" instead of "challenging" and "problem" instead of "one".
formidable obstacle
Highlights the intimidating nature of the challenge, replacing "challenging" with "formidable" and "one" with "obstacle".
testing experience
Shifts the focus to the impact on the individual, using "testing" instead of "challenging" and "experience" instead of "one".
taxing endeavor
Emphasizes the draining aspect of the challenge, using "taxing" instead of "challenging" and "endeavor" instead of "one".
trying circumstance
Highlights the stressful nature of the situation, replacing "challenging" with "trying" and "one" with "circumstance".
laborious effort
Focuses on the amount of work involved, using "laborious" instead of "challenging" and "effort" instead of "one".
FAQs
How can I use "challenging one" in a sentence?
You can use "challenging one" to describe a task, situation, or problem that is difficult or requires significant effort. For example, "This project is a "challenging one", but I'm confident we can succeed".
What are some alternatives to "challenging one"?
Depending on the context, you can use alternatives such as "difficult task", "tough assignment", or "demanding situation".
Is "challenging one" formal or informal?
"Challenging one" leans towards the formal side but is versatile enough for neutral contexts. In very informal settings, simpler words like "tough" or "hard" might be more appropriate.
What makes something a "challenging one"?
A "challenging one" implies that the task, situation or problem requires more than usual effort, skill, or resilience to overcome. It suggests a level of difficulty that tests one's abilities.
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
82%
Authority and reliability
4.5/5
Expert rating
Real-world application tested