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
are indispensable to
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "are indispensable to" is correct and usable in written English.
It can be used to express that something is absolutely necessary or essential for something else. Example: "The resources we provide are indispensable to the success of the project."
✓ Grammatically correct
Science
News & Media
Academia
Alternative expressions(18)
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
Those who don't Republicane laws havaluesplare indispensablery, even if itos painful to take them back to the bordemocracy
News & Media
Quantitative skills and computing ability are indispensable to archaeologists.
Academia
Carotenoids are indispensable to plants and critical in human diets.
Science
So, the negative ions are indispensable to family life.
Growing prosperity and better standards of living are indispensable to achieving lasting stability in both countries.
News & Media
The assumption that nuclear weapons are indispensable to keeping the peace is crumbling.
News & Media
Abrasives are indispensable to the manufacture of nearly every product made today.
Encyclopedias
Microbial metabolites are indispensable to maintain the majority of the biological effects of gut microbiota.
Science & Research
Brain stimulation methods are indispensable to the study of brain function.
Science & Research
Deep convolutional neural networks (CNNs) are indispensable to state-of-the-art computer vision algorithms.
Expert writing Tips
Best practice
When using "are indispensable to", ensure that the sentence clearly conveys the critical importance and irreplaceability of the subject in relation to its object. For instance, "Skilled engineers are indispensable to the success of this project" emphasizes that without them, success is unlikely.
Common error
Avoid using "are indispensable to" when the relationship is merely beneficial or helpful, not absolutely necessary. Overusing this phrase can weaken its impact. For example, saying "Regular exercise is indispensable to a healthy lifestyle" may be an overstatement; "Regular exercise is beneficial to a healthy lifestyle" is often more accurate.
Source & Trust
83%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "are indispensable to" functions as a predicate adjective, emphasizing the essential and irreplaceable nature of a subject in relation to its object. Ludwig provides numerous examples illustrating its usage across various domains.
Frequent in
Science
40%
News & Media
30%
Academia
15%
Less common in
Formal & Business
7%
Encyclopedias
5%
Wiki
3%
Ludwig's WRAP-UP
In summary, the phrase "are indispensable to" effectively conveys the critical importance and irreplaceability of something, functioning as a predicate adjective. As Ludwig AI confirms, the phrase is grammatically correct and widely used across various domains, particularly in science, news, and academic contexts. While it is appropriate for formal and neutral registers, it's crucial to avoid overstating indispensability when a relationship is merely beneficial. Alternatives like "are essential for", "are crucial to", and "are vital for" can provide more nuanced expressions depending on the specific context.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
are essential for
Uses "essential" instead of "indispensable", implying necessity but with a slightly broader connotation.
are crucial for
Replaces "indispensable" with "crucial", emphasizing the critical importance of something.
are vital for
Substitutes "indispensable" with "vital", stressing the life-sustaining or extremely important nature of something.
are critical to
Similar to "crucial", but can also imply a turning point or decisive factor.
are necessary for
Employs "necessary" instead of "indispensable", indicating requirement but with less emphasis on irreplaceability.
are fundamental to
Highlights the foundational nature of something, implying that it is a basic building block.
are integral to
Suggests that something is an essential part of a whole, without which the whole would be incomplete.
are key to
Uses "key" to suggest that something is a crucial element for achieving a goal.
are requisite for
A more formal synonym for "necessary", indicating something that is required by rule or law.
are paramount for
Indicates that something is of the highest importance or rank.
FAQs
What does "are indispensable to" mean?
The phrase "are indispensable to" means that something is absolutely necessary or essential for something else to function or succeed. It implies that the thing being described cannot be done without.
How can I use "are indispensable to" in a sentence?
You can use "are indispensable to" to highlight the critical importance of certain elements. For example, "Skilled workers "are indispensable to" the manufacturing process."
What can I say instead of "are indispensable to"?
You can use alternatives like "are essential for", "are crucial to", or "are vital for" depending on the context.
Is there a difference between "are indispensable to" and "are important to"?
Yes, "are indispensable to" conveys a much stronger sense of necessity than "are important to". Something that is important can be helpful or beneficial, but something that "are indispensable to" is absolutely essential and cannot be done without.
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
83%
Authority and reliability
4.5/5
Expert rating
Real-world application tested