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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
is sick
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "is sick" is correct and usable in written English.
It can be used to describe someone who is unwell or to express that something is impressive or cool in informal contexts. Example: "She is sick with the flu and needs to rest at home."
✓ Grammatically correct
News & Media
Formal & Business
Wiki
Alternative expressions(6)
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
54 human-written examples
This is sick".
News & Media
Lake Erie is sick.
News & Media
The husband is sick.
News & Media
"He is sick.
News & Media
She is sick.
News & Media
"My husband is sick".
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
6 human-written examples
You're sick, sick".
News & Media
"If I'm sick, they're sick.
News & Media
Some are sick.
News & Media
"He just was sick".
News & Media
Agent: "You are sick?
News & Media
Expert writing Tips
Best practice
When using "is sick" in informal contexts to mean "cool" or "awesome", be mindful of your audience, as this usage may not be universally understood or appreciated.
Common error
Avoid ambiguity by clarifying the context when using "is sick". For example, specify "is sick with the flu" to prevent misinterpretation when you mean illness rather than approval.
Source & Trust
82%
Authority and reliability
4.3/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "is sick" primarily functions as a predicate adjective, describing the state of being unwell. However, as Ludwig AI indicates, it also serves as a predicate adjective in informal contexts to express approval or admiration, meaning something is cool or excellent.
Frequent in
News & Media
45%
Formal & Business
20%
Wiki
15%
Less common in
Science
10%
Encyclopedias
5%
Reference
5%
Ludwig's WRAP-UP
The phrase "is sick" is a versatile expression with meanings ranging from describing a state of illness to conveying approval in informal contexts. As Ludwig AI explains, its grammatical correctness and wide usage are well-supported by examples from diverse sources like news media, formal documents, and wikis. While generally acceptable, context is crucial to avoid ambiguity. When referring to health, it's relatively neutral, but its slang usage leans towards informality. Being mindful of the audience and clarifying intent can enhance effective communication. Related phrases like "is unwell" or "is ill" provide safer alternatives in professional settings, while "is awesome" directly conveys approval.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
is unwell
Replaces "sick" with a more formal synonym indicating poor health.
is ill
A common and direct synonym for "is sick", indicating a state of poor health.
is not well
A slightly more verbose way of saying "is sick", focusing on the absence of good health.
is feeling poorly
Emphasizes the subjective experience of being sick.
is under the weather
An idiomatic expression for feeling slightly unwell.
is diseased
Indicates a medical condition or ailment.
is nauseated
Specifies the symptom of feeling sick to one's stomach.
is jaded with
Expresses being tired or bored of something, reflecting one of the informal meanings of "sick".
is tired of
Focuses on the feeling of weariness or disgust towards something, similar to being "sick of" it.
is excellent
Mirrors the slang usage of "sick" to mean impressive or outstanding.
FAQs
How can I use "is sick" in a sentence?
What's the difference between "is sick" and "is ill"?
"Is sick" and "is ill" are often interchangeable, both indicating poor health. However, "is ill" /s/is+ill may be perceived as slightly more formal than "is sick" /s/is+sick.
What can I say instead of "is sick" when referring to being tired of something?
If you mean you are tired or bored of something, you can use alternatives like "is tired of", "is fed up with", or "is jaded with" depending on the context.
When is it appropriate to use "is sick" to mean "cool" or "awesome"?
Using "is sick" to mean "cool" or "awesome" is appropriate in informal settings, especially among younger people or in specific subcultures. However, it's best to avoid this usage in formal or professional contexts where it may not be understood or appreciated.
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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
82%
Authority and reliability
4.3/5
Expert rating
Real-world application tested