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
be a thorny problem
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "be a thorny problem" is correct and usable in written English.
It can be used to describe a situation or issue that is complicated, difficult, or troublesome to resolve. Example: "The decision to cut funding for the project has turned out to be a thorny problem for the committee."
✓ Grammatically correct
Science
Academia
News & Media
Alternative expressions(1)
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified similar examples from authoritative sources
Similar Expressions
60 human-written examples
On the other hand, the NMOS side is shown to be a thornier problem to solve: a new solution based on the use of oxidized Ta as a diffusion barrier is proposed, and a HfO2/TiN/TaOX/TiAl/TiN/TiN gate stack featuring an aggressive Work Function of 4.35 eV (allowing a Work Function separation of 600 mV between NMOS and PMOS) is demonstrated.
Science
Solving planetary ozone levels is a thorny problem.
Academia
How to obtain the analytic solution of uncertain differential equation has always been a thorny problem.
One of the biggest obstacles — lack of price transparency — is a thorny problem.
Academia
Medicare is a thorny problem; Social Security, by comparison, is a cinch.
News & Media
It's a thorny problem: how do you map something you cannot see?
News & Media
The registration process has been a thorny problem at this camp.
News & Media
Fatigue damages in orthotropic steel deck have been a thorny problem that perplexed bridge engineers worldwide for decades.
Science
This is a thorny problem, as complicity in torture is considered such a serious crime, in international law, that immunity is not generally possible.
News & Media
Here's a thorny problem: to develop an objective way to rank countries according to the quality of life they offer their citizens.
News & Media
How to deal with the diagnosis and treatment of concussions has always been a thorny problem for the International Rugby Board, the sport's world governing body, and the board will discuss strengthening the rules surrounding concussions this week.
News & Media
Expert writing Tips
Best practice
Use "be a thorny problem" to describe situations where multiple factors complicate finding a solution. The metaphor of 'thorns' suggests that the issue is not only difficult but also potentially painful or irritating to deal with.
Common error
Avoid using "be a thorny problem" in contexts where the difficulty is straightforward or easily explained. The phrase implies a deeper, more intricate level of complexity.
Source & Trust
82%
Authority and reliability
4.1/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "be a thorny problem" functions as a predicative expression. It identifies a subject as being a difficult and complex issue. This usage is supported by Ludwig, which confirms its grammatical correctness and common usage in varied contexts.
Frequent in
News & Media
33%
Science
33%
Academia
33%
Less common in
Formal & Business
0%
Wiki
0%
Encyclopedias
0%
Ludwig's WRAP-UP
The phrase "be a thorny problem" is a grammatically correct and widely understood way to describe a complex and difficult issue. As Ludwig confirms, it's used across various contexts, including news, science, and academia. While it may not be the most frequent expression, its metaphorical use of 'thorns' effectively conveys the idea that the problem is not only challenging but also potentially irritating or painful to resolve. When using this phrase, it's important to ensure that the context genuinely reflects a situation with multiple complicating factors, as overuse in simple situations could diminish its impact. More common alternatives include "be a difficult issue" or "be a complex challenge".
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
be a difficult issue
Replaces 'thorny' with a more general term for difficulty.
be a complex challenge
Substitutes 'problem' with 'challenge' and 'thorny' with 'complex', softening the negative connotation.
pose a significant difficulty
Changes the structure to emphasize the act of creating a difficulty.
present a tough challenge
Uses 'tough' instead of 'thorny', maintaining a similar level of intensity.
be a knotty issue
Replaces 'thorny' with 'knotty', another metaphor for complexity and difficulty.
be a vexing question
Shifts the focus to a question that causes irritation or difficulty.
be a problematic situation
Replaces 'thorny problem' with a more descriptive phrase.
be a complicated matter
Uses a more neutral term ('matter') to describe the problem.
involve considerable difficulties
Focuses on the difficulties involved rather than describing the issue itself.
be a source of contention
Highlights the disagreement and debate associated with the issue.
FAQs
What does "be a thorny problem" mean?
The phrase "be a thorny problem" describes a situation or issue that is complex, difficult, and potentially troublesome to resolve. The 'thorny' aspect suggests that dealing with the problem might be irritating or painful.
What are some alternatives to "be a thorny problem"?
You can use alternatives like "be a difficult issue", "be a complex challenge", or "present a tough challenge" depending on the context.
How formal is the phrase "be a thorny problem"?
The phrase "be a thorny problem" is suitable for a range of contexts, from news and media to academic discussions. It is generally considered appropriate for neutral to slightly formal settings.
Is it correct to say "is a thorny problem" or "is a thorn problem"?
The correct and idiomatic expression is "is a thorny problem". "Is a thorn problem" is not a recognized or meaningful phrase.
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
4.1/5
Expert rating
Real-world application tested