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 sounds complex
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "that sounds complex" is correct and usable in written English.
You can use it when responding to a statement or idea that appears intricate or difficult to understand. Example: "The project involves multiple layers of data analysis and integration. I must admit, that sounds complex."
✓ Grammatically correct
News & Media
Wiki
Science
Alternative expressions(20)
that sounds challenging
that sounds interesting
that sounds stressful
this is challenging
that sounds extreme
that sounds demanding
that must be painful
this seems challenging
that appears difficult
That sounds challenging
that must be true
that must be tough
that presents a challenge
that sounds rough
this was challenging
that sounds difficult
that must be hard
that seems challenging
that sounds harder
that sounds hard
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
4 human-written examples
Battling monsters, recruiting a crew, and casting spells by matching tiles in this action/puzzler that sounds complex, but is actually glorious fun.
News & Media
If you think that sounds complex, you're right.
News & Media
That sounds complex to me.
News & Media
While that sounds complex, you could simply think of your paradigm as the rules or guidelines for living your life, adjusting to conflict and overcoming challenges.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
55 human-written examples
After categorising different types of leaf, Wilkinson gives recipes for his five essential dressings, including a simple lemon dressing and salad cream, before launching into recipes that sound complex and exotic but are technically simple and incredibly inventive: sesame-fried asparagus with sashimi and miso, radishes and chilli, pickled octopus, avocado and cauliflower.
News & Media
Yes, it sounds complex... but that's how you think outside of the box in a deep business situation.
News & Media
If the technology sounds complex.
News & Media
If it sounds complex, it is.
News & Media
It sounds complex, but they do something similar in Scotland, and it works.
News & Media
If it sounds complex, it isn't; it's designed so anyone can play.
News & Media
While it sounds complex, the installation process is actually rather simple.
News & Media
Expert writing Tips
Best practice
Use "that sounds complex" when you want to acknowledge that something may be difficult to understand at first glance, but don't want to discourage further exploration or explanation. It's a polite way to express potential difficulty.
Common error
Avoid dismissing an idea or process simply because "that sounds complex". Instead, use it as an opportunity to ask clarifying questions and gain a better understanding.
Source & Trust
81%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "that sounds complex" primarily functions as a commentary or reaction to a statement or explanation, indicating the speaker's perception of intricacy or difficulty. As Ludwig AI suggests, it acknowledges perceived complexity without necessarily judging it negatively. It can be used in various contexts, as seen in the examples provided.
Frequent in
News & Media
44%
Wiki
22%
Science
22%
Less common in
Formal & Business
3%
Encyclopedias
3%
Reference
3%
Ludwig's WRAP-UP
In summary, "that sounds complex" is a versatile phrase used to acknowledge perceived intricacy. As pointed out by Ludwig AI, it is considered grammatically correct and suitable for a range of contexts. While often used in neutral or informal settings, its application can extend to professional environments when used thoughtfully. The phrase invites clarification, displays engagement, and opens a conversation, serving as a useful tool for navigating potentially challenging information. Remember to use the phrase carefully, ensuring that your tone remains inquisitive and that you genuinely want to understand the concept, and not as a way to dismiss something.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
that seems complicated
Simple substitution of 'sounds' for 'seems' and 'complex' for 'complicated'.
that is rather complex
Adds 'rather' to soften the statement.
that appears intricate
Replaces 'sounds' with 'appears' and 'complex' with 'intricate', emphasizing visual assessment of complexity.
that is arguably complex
Adds 'arguably' to indicate that the complexity is debatable.
that looks complicated
Focuses on visual complexity rather than aural, substituting 'sounds' with 'looks'.
that gives the impression of complexity
More verbose, highlights the conveyed sense of complexity.
that presents itself as complex
Emphasizes the active presentation of complexity.
that is seemingly complex
Adds 'seemingly' to indicate potential deceptive simplicity beneath the surface.
that has a complex nature
Focuses on the inherent nature of complexity.
that's not exactly simple
Uses understatement to convey complexity.
FAQs
How can I rephrase "that sounds complex" to be more encouraging?
You can try phrases like "that sounds challenging" or "that sounds interesting" depending on the context. These alternatives can make the other person more open to explaining the topic.
Is "that sounds complex" appropriate in a professional setting?
Yes, "that sounds complex" is acceptable in professional environments, especially when genuinely trying to understand something. However, ensure your tone is inquisitive and respectful, not dismissive.
What's a more formal way to say "that sounds complex"?
A more formal alternative is "that appears to be intricate" or "that presents as complex". These options use more sophisticated vocabulary and syntax.
When should I avoid using "that sounds complex"?
Avoid using "that sounds complex" when you haven't given the idea any consideration or if your tone is condescending. It can come across as dismissive if not used carefully.
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Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
81%
Authority and reliability
4.5/5
Expert rating
Real-world application tested