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
that appears difficult
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "that appears difficult" is correct and usable in written English.
You can use it when describing something that seems challenging or hard to understand. Example: "The math problem that appears difficult at first can actually be solved with a simple formula."
✓ Grammatically correct
Alternative expressions(20)
that looks tough
that must be painful
that must be true
That sounds challenging
that must be tough
that presents a challenge
that sounds rough
that must be hard
that sounds difficult
that seems challenging
that sounds harder
that sounds hard
that sounds unpleasant
that sounds daunting
that sounds extreme
that must be nice
that sounds complicated
that must be difficult
that seems difficult
that sounds challenging
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
"If cases that appear difficult to win do not get to court," says Hamish Brown, a retired senior police officer and expert on sexual violence, "then jurors will never get the chance to become educated about those more complicated cases that rarely go forward".
News & Media
We humans have weaknesses in our character that appear difficult if not impossible to overcome by our own efforts.
Science
The Eurocode 2 System used here to categorize food appears to be user friendly and is available on the Internet with instructions on how to categorize food items that appear difficult to assign to 1 category (14 ).
Science
In our previous study (Badke et al. 2013), we found that increasing the size of the reference panel led to an improved imputation, especially of SNP that appear difficult to impute, such as SNP with low (<0.1) MAF and those located in the chromosomal extremes.
Science
That task appears difficult given the graduation of senior driver Hannah Walleck, a Mission League first-team selection who led her squad with 93 goals and 49 assists.
News & Media
Secondly, the PCFP and other UNICEF sector programs contain a multiplicity of different activities going on at the same time, such that it appears difficult to fully review and document all of them.
Formal & Business
Nadal holds the No. 1 overall ranking, but received the No. 2 seed here, along with a draw that appears more difficult than Federer's at the outset.
News & Media
We understand that this assay appears difficult and challenging and like microsurgical experiments, these electroporations require a significant training to position the electrode at the desired location appropriately.
Science
Despite nursing home staff members' knowledge of dignity-conserving aspects in general and of aspects important for an individual resident's dignity, dignity-conserving care that is tailored to an individual appears difficult to bring about in practice.
Science
Quantitative data on UGT-glucuronosyltransferase, sulfotransferase, and N-acetyltransferase activities for the same substrate in the skin of human and at least one animal species are so scarce that a meaningful comparison appears difficult (Tables 5, 6).
Science
On the background of this development, it seems that at a time when relativism appears difficult to surmount, authenticity has become a last measure of value and a common currency in contemporary cultural life (Jay 2004).
Science
Expert writing Tips
Best practice
Use "that appears difficult" to introduce a topic or task that may seem daunting initially but could be manageable with the right approach or knowledge.
Common error
Avoid using "that appears difficult" when a simpler or more direct description of the challenge would suffice. Overusing it can make your writing sound unnecessarily dramatic.
Source & Trust
60%
Authority and reliability
3.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "that appears difficult" functions as a qualifying clause, often introducing a subject or task that presents an initial impression of being challenging or complex. Ludwig confirms this usage through various examples.
Frequent in
Science
0%
News & Media
0%
Formal & Business
0%
Less common in
Science
0%
News & Media
0%
Formal & Business
0%
Ludwig's WRAP-UP
In summary, the phrase "that appears difficult" is a grammatically sound and usable expression in English, employed to introduce topics or tasks perceived as challenging. Ludwig AI confirms its validity. While the phrase enjoys broad applicability, its frequency is relatively uncommon. It is used across various registers, including academic, professional, and general media. When using "that appears difficult", ensure it accurately reflects a genuine challenge and isn't used for unnecessary exaggeration. Consider alternatives like ""that seems challenging"" or ""that looks hard"" depending on your desired level of formality and emphasis.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
that seems challenging
Replaces "appears" with "seems", emphasizing a subjective impression of difficulty.
that looks hard
Uses a more direct and simple vocabulary to convey difficulty.
that presents a challenge
Shifts the focus to the inherent challenge rather than the appearance of difficulty.
that is seemingly complex
Replaces "difficult" with "complex" and adds "seemingly" to highlight the perceived complexity.
that gives the impression of being hard
Expands the phrase to explicitly state the impression of difficulty.
that one perceives as arduous
Uses more formal language to describe the perception of something being difficult.
that is not easy at first glance
Focuses on the initial impression of something not being easy.
that presents considerable obstacles
Highlights the obstacles presented by something that appears difficult.
that poses significant hurdles
Uses "hurdles" to represent challenges and emphasizes their significance.
that smacks of improbability
Suggests a stronger sense of doubt or unlikelihood of success.
FAQs
How can I use "that appears difficult" in a sentence?
You can use "that appears difficult" to describe something that seems challenging or hard to understand. For example: "The math problem "that appears difficult" at first can actually be solved with a simple formula."
What are some alternatives to saying "that appears difficult"?
You can use alternatives like "that seems challenging", "that looks hard", or "that presents a challenge" depending on the context.
Is it better to say "that appears difficult" or "that is difficult"?
"That appears difficult" suggests a subjective assessment or initial impression of difficulty, while "that is difficult" states it as a fact. The choice depends on whether you want to emphasize the perception of difficulty or state it as an objective truth.
What's the difference between "that appears difficult" and "that seems difficult"?
Both phrases are very similar. "Appears" and "seems" are nearly synonymous in this context, both indicating a subjective impression. The choice often comes down to personal preference or stylistic variation.
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
60%
Authority and reliability
3.5/5
Expert rating
Real-world application tested