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
it was key
Grammar usage guide and real-world examplesUSAGE SUMMARY
'it was key' is a correct and usable part of a sentence in written English.
You can use it to express that something was essential or critical to the outcome of a situation. For example: "Winning the argument was key; without it, the project would have failed."
✓ Grammatically correct
News & Media
Academia
Science
Alternative expressions(20)
it was crucial
it was essential
it was vital
it was paramount
it was critical
it was indispensable
it was fundamental
it was a necessity
it was of the essence
it was significant
it was pivotal
it was instrumental
it was primary
it was major
it was substantial
it was main
it was dominant
it was important
it was leading
it was enabling
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
57 human-written examples
The laptop was worth far more to my son than just its monetary value -- it was key to the journalism career he was working to build.
News & Media
"It was Key West from 50 years earlier, back when people still wanted to go to Key West," Larry remembers of his first impressions.
News & Media
For Cardwell, it was key.
News & Media
And it was key to sushi's crossover.
News & Media
"Having a retailer like Costco buy into it was key".
News & Media
I felt it was key to expand the dramatic writing options in the playwriting concentration.
Academia
Radcliffe said that a commitment to security, and a continued awareness of it, was key.
News & Media
For me, it was key to ground my story in the culture of Nigeria.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
3 human-written examples
"It's key.
News & Media
And it is key.
News & Media
And it's key.
News & Media
Expert writing Tips
Best practice
Use "it was key" to emphasize a specific action, element, or factor that was indispensable for achieving a desired outcome. This phrase is particularly effective when highlighting a turning point or a critical component of success.
Common error
Avoid overuse of "it was key" in close proximity within your writing. While effective, frequent repetition can diminish its impact. Instead, vary your language by using synonyms like "crucial", "essential", or "vital" to maintain reader engagement and clarity.
Source & Trust
88%
Authority and reliability
4.6/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "it was key" functions as a predicative expression, emphasizing the critical importance or necessity of a particular element or action. Ludwig AI confirms its grammatical correctness and usability.
Frequent in
News & Media
68%
Academia
18%
Science
14%
Less common in
Wiki
0%
Formal & Business
0%
Encyclopedias
0%
Ludwig's WRAP-UP
In summary, "it was key" is a widely used phrase to emphasize the crucial nature of an element or action. Ludwig AI confirms that the expression is grammatically correct, and the phrase is commonly found in News & Media, academic and scientific contexts. To enhance your writing, remember to vary your language and be mindful of the context's formality. While "it was key" is useful in many situations, synonyms like "it was crucial" or "it was essential" can help avoid repetition. Always ensure the phrase aligns with the intended emphasis and the overall tone of your writing.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
it was crucial
Replaces 'key' with 'crucial', emphasizing the importance.
it was essential
Substitutes 'key' with 'essential', highlighting the necessity.
it was vital
Replaces 'key' with 'vital', stressing the indispensability.
it was critical
Substitutes 'key' with 'critical', underscoring the importance for success.
it was paramount
Replaces 'key' with 'paramount', indicating top-level importance.
it was indispensable
Replaces 'key' emphasizing that something cannot be done without.
it was fundamental
Substitutes 'key' with 'fundamental', indicating it forms a necessary base.
it was a necessity
Rephrases to highlight the required nature of something.
it was of the essence
Emphasizes the crucial timing and nature of something.
it was significant
Replaces 'key' with 'significant', indicating its noteworthiness and importance.
FAQs
How can I use "it was key" in a sentence?
Use "it was key" to highlight a pivotal element or action. For instance, "Securing funding "it was key" to launching the project successfully."
What are some alternatives to "it was key"?
Consider alternatives such as "it was crucial", "it was essential", or "it was vital" to add variety to your writing.
Is "it was key" formal or informal?
"It was key" is suitable for both neutral and professional contexts. However, in highly formal settings, consider using a more sophisticated alternative like "it was paramount".
What's the difference between "it was key" and "it was important"?
"It was key" implies a higher degree of necessity than "it was important". Key suggests that the element was indispensable, while important suggests it was significant but not necessarily crucial. For example, if someone said, "solving the key was important", it's less decisive than "solving the key was key".
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