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
the only obstacle
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "the only obstacle" is correct and usable in written English.
You can use it to refer to a singular barrier or challenge that is preventing progress or success in a particular situation. Example: "The only obstacle standing in our way is the lack of funding for the project."
✓ Grammatically correct
News & Media
Science
Formal & Business
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
55 human-written examples
That's the only obstacle.
News & Media
Fishermen are not the only obstacle.
News & Media
Public opinion isn't the only obstacle.
News & Media
But that wasn't the only obstacle.
News & Media
Is that the only obstacle, though?
News & Media
There, the only obstacle is a skylight.
News & Media
But cost is not the only obstacle.
News & Media
That is not the only obstacle Mitchell will face.
News & Media
But cellphones are not the only obstacle to classroom learning.
News & Media
The bum is not the only obstacle, though.
News & Media
GETTING IN The only obstacle is finding the unmarked door.
News & Media
Expert writing Tips
Best practice
To enhance clarity, follow "the only obstacle" with a specific explanation of what makes it so and how it affects the situation.
Common error
Avoid presenting multiple challenges as "the only obstacle". This dilutes the significance of the actual primary impediment and can mislead your audience.
Source & Trust
88%
Authority and reliability
4.6/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "the only obstacle" functions as a noun phrase, typically serving as a subject complement or an object in a sentence. According to Ludwig, it correctly identifies a single, unique impediment. It pinpoints the sole barrier preventing progress or achievement.
Frequent in
News & Media
67%
Science
12%
Formal & Business
8%
Less common in
Wiki
5%
Encyclopedias
4%
Reference
4%
Ludwig's WRAP-UP
The phrase "the only obstacle" is a grammatically correct and frequently used expression to identify a singular barrier or impediment. As confirmed by Ludwig AI, it's used across varied contexts, including news, science, and business, with a neutral tone. Related phrases like "the sole impediment" or "the singular barrier" can provide alternative phrasing. When using this phrase, ensure clarity and accuracy in pinpointing the one true hindrance, avoiding the common error of misrepresenting multiple issues as one. Overall, the phrase is a valuable tool for clear and focused communication.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
the sole impediment
Replaces 'obstacle' with 'impediment', emphasizing a hindering effect that is the only one present.
the singular barrier
Uses 'barrier' instead of 'obstacle', stressing the idea of a boundary that is the only one.
the only challenge
Substitutes 'obstacle' with 'challenge', focusing on a difficult task or problem that is the only one.
the one hurdle
Employs 'hurdle' to convey an obstacle that must be overcome, specifying that it's the single one.
the main stumbling block
Highlights a 'stumbling block', emphasizing a primary difficulty that prevents progress and is the only one.
the single deterrent
Uses 'deterrent' to describe something that discourages or prevents action, stressing that it's the only one.
the only stumbling block
Highlights a 'stumbling block', emphasizing a primary difficulty that prevents progress.
the last remaining problem
Shifts the focus to a problem that is the last one left to resolve.
the one major issue
Focuses on an 'issue' that is the primary and only significant concern.
the single snag
Replaces 'obstacle' with 'snag', suggesting a small or unexpected difficulty that is the only one.
FAQs
How can I use "the only obstacle" in a sentence?
You can use "the only obstacle" to identify a single barrier preventing progress. For example, "The lack of funding is "the only obstacle" to completing the project".
What are some alternatives to "the only obstacle"?
Alternatives include "the sole impediment", "the singular barrier", or "the only challenge". The best choice depends on the specific nuance you wish to convey.
Is it grammatically correct to say "the only obstacles" instead of "the only obstacle"?
Using "the only obstacles" implies there are multiple barriers, whereas "the only obstacle" refers to a single one. Choose the phrasing that accurately reflects the situation.
What's the difference between "the main obstacle" and "the only obstacle"?
"The main obstacle" suggests there are other obstacles, but this one is the most significant. "The only obstacle", in contrast, states that there are no other impediments.
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
88%
Authority and reliability
4.6/5
Expert rating
Real-world application tested