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
cannot be lost
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "cannot be lost" is correct and usable in written English.
It can be used to express that something is secure or guaranteed not to disappear or be forgotten. Example: "The memories we created together cannot be lost, no matter how much time passes."
✓ Grammatically correct
News & Media
Science
Academia
Wiki
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
It cannot be lost or destroyed.
News & Media
That kind of reaction cannot be lost on others.
News & Media
The irony cannot be lost on Salford fans.
News & Media
'5) A domicile cannot be lost until a new one has been acquired.
Academia
Meanwhile, physicists have more reason than ever to think that information cannot be lost.
News & Media
Or, as Childs says, "In our repetition, we cannot be lost.
News & Media
But the truth is more complex and innocence cannot be lost or found.
News & Media
Although the cryptocurrency cannot be "lost", the 64-character "private keys" that give owners access to their digital wallets can.
News & Media
Simultaneous logic and its inverse in a single circuit is an important design because input data of a circuit cannot be lost during operation.
Science
Afghanistan may have all along been an unwinnable war, but it is just as much a conflict that cannot be lost without dire consequences.
News & Media
These things cannot be lost, according to the way we think the universe works, and physicists generally believe that they aren't really lost.
News & Media
Expert writing Tips
Best practice
Use "cannot be lost" to emphasize the irretrievability or permanence of something, whether it's data, a feeling, or a principle.
Common error
While "cannot be lost" is versatile, avoid using it excessively in informal writing where simpler alternatives like "won't be lost" or "can't be lost" may sound more natural.
Source & Trust
85%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "cannot be lost" functions as a passive construction indicating that something is irretrievable or impossible to misplace. As Ludwig AI confirms, this phrase is grammatically correct and widely used.
Frequent in
News & Media
30%
Science
30%
Academia
15%
Less common in
Wiki
10%
Formal & Business
10%
Reference
5%
Ludwig's WRAP-UP
In summary, the phrase "cannot be lost" is a grammatically correct and commonly used expression that conveys the idea of permanence, security, or indispensability. As Ludwig AI confirms, it's used across various contexts, from news and media to scientific and academic writing. While versatile, it's important to consider the tone and register of your writing, opting for more informal alternatives like "can't be lost" in casual settings. To maintain clarity and avoid overuse, consider employing related phrases such as "must be preserved" or "cannot be forgotten", depending on the specific meaning you wish to convey.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
cannot be forgotten
Focuses on the impossibility of something fading from memory.
cannot be erased
Highlights the permanence and indelibility of something.
must be preserved
Emphasizes the necessity of maintaining something in its current state.
must be retained
Highlights the importance of keeping something without change.
cannot be forfeited
Focuses on something being impossible to give up or lose a right to.
cannot be squandered
Highlights the idea that something shouldn't be wasted.
cannot be compromised
Emphasizes that the original state of something must not be damaged.
cannot be neglected
Focuses on the importance of giving continuous attention.
cannot be overlooked
Highlights the necessity of paying careful attention to something, because it's important.
cannot be reversed
Implies that once something is done, its effects are permanent.
FAQs
How can I use "cannot be lost" in a sentence?
You can use "cannot be lost" to express that something is secure, guaranteed, or indispensable. For instance, "The data on this hard drive cannot be lost" or "The value of integrity cannot be lost in our pursuit of success".
What are some alternatives to "cannot be lost"?
Alternatives include "cannot be forgotten", "cannot be erased", "must be preserved", or "cannot be forfeited depending on the context".
Is it better to say "cannot be lost" or "can't be lost"?
"Cannot be lost" is more formal, whereas "can't be lost" is more informal. Choose the phrasing that best suits the tone and register of your writing.
What's the difference between "cannot be lost" and "should not be lost"?
"Cannot be lost" implies a higher degree of certainty or security; something is inherently protected from being lost. "Should not be lost" implies a recommendation or desire to prevent loss, but doesn't guarantee it.
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
85%
Authority and reliability
4.5/5
Expert rating
Real-world application tested