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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
they are indispensable
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "they are indispensable" is correct and usable in written English.
You can use it to emphasize the essential nature or necessity of something or someone in a particular context. Example: "In our project, the team members are indispensable; without their expertise, we wouldn't succeed."
✓ Grammatically correct
Science
News & Media
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
60 human-written examples
They are indispensable to its full implementation.
News & Media
"They are indispensable to our food production.
News & Media
They are indispensable, like a prizefighter's hours upon the road".
News & Media
In short, they are indispensable for the industry.
News & Media
"I can tell you that they are indispensable for farming".
News & Media
And they are indispensable for transporting knives to a picnic.
News & Media
They are indispensable, and yet are the most socially marginalised group of workers in China.
News & Media
Zhao's intentions are more modest; but history shows that they are indispensable.
News & Media
Hence it can be (and is) argued that they are indispensable for certain sorts of research.
News & Media
So people don't know why they are indispensable and shouldn't be let go.
News & Media
To some people they are indispensable, but for everyday use they are too right-brainy for me.
News & Media
Expert writing Tips
Best practice
Use "they are indispensable" to clearly communicate the critical importance of certain elements or individuals in a given situation. It adds weight and emphasizes their irreplaceable nature.
Common error
Avoid using "they are indispensable" in casual conversations or informal writing where simpler terms like "they are important" or "they are needed" might be more appropriate. The phrase carries a strong sense of formality.
Source & Trust
85%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "they are indispensable" functions as a declarative statement, asserting the essential nature of a subject. Ludwig examples confirm its usage in emphasizing crucial roles or components. It highlights elements that cannot be done without.
Frequent in
Science
40%
News & Media
35%
Formal & Business
10%
Less common in
Wiki
3%
Encyclopedias
0%
Reference
0%
Ludwig's WRAP-UP
The phrase "they are indispensable" is a grammatically correct and frequently used expression to highlight the critical necessity of certain elements or individuals. Ludwig AI confirms its validity and widespread application across diverse contexts. Predominantly found in scientific, news media, and formal business writing, it emphasizes elements that are not merely important but fundamentally required. When aiming for a more casual tone, alternatives such as "they are essential" or "they are crucial" may be more suitable. However, in scenarios demanding emphasis on irreplaceability, "they are indispensable" remains the most effective choice.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
they are crucial
Replaces "indispensable" with "crucial", emphasizing the critical importance.
they are essential
Substitutes "indispensable" with "essential", indicating fundamental necessity.
they are vital
Replaces "indispensable" with "vital", highlighting the importance for continued existence or effectiveness.
they are necessary
Uses "necessary" instead of "indispensable", denoting a requirement.
they are required
Employs "required" in place of "indispensable", suggesting that something is mandatory.
they are fundamental
Replaces "indispensable" with "fundamental", emphasizing the basic or foundational nature.
they are irreplaceable
Uses "irreplaceable" instead of "indispensable", highlighting the uniqueness and lack of substitutes.
they are integral
Replaces "indispensable" with "integral", indicating that something is an essential part of a whole.
they are key
Substitutes "indispensable" with "key", suggesting that something is crucial for achieving a particular outcome.
they are paramount
Replaces "indispensable" with "paramount", emphasizing the supreme importance.
FAQs
How can I use "they are indispensable" in a sentence?
You can use "they are indispensable" to emphasize that certain people, things, or concepts are absolutely necessary or crucial in a particular context. For example, "These tools "they are indispensable" for completing the project successfully".
What are some alternatives to saying "they are indispensable"?
Alternatives include "they are essential", "they are crucial", or "they are vital". The best choice depends on the specific nuance you want to convey.
Is it ever incorrect to use "they are indispensable"?
While grammatically correct, using "they are indispensable" might be seen as overly formal or hyperbolic in very casual settings. Consider your audience and the overall tone of your communication.
What is the difference between "they are indispensable" and "they are important"?
"They are indispensable" suggests a higher degree of necessity than "they are important". Indispensable implies that success or proper functioning is impossible without them, whereas important simply means they have significant value or impact.
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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
85%
Authority and reliability
4.5/5
Expert rating
Real-world application tested