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
lest that
Grammar usage guide and real-world examplesUSAGE SUMMARY
'lest that' is correct and usable in written English.
It is used for expressing a warning or a concern about a possible negative outcome. For example: You must be careful when crossing the street, lest that you get hit by a car.
✓ Grammatically correct
News & Media
Academia
Alternative expressions(20)
for fear that
in order to avoid
so as not to
for the purpose of avoiding
with the intention of preventing
to guard against
to prevent
in the hope of averting
to preclude the possibility of
lest vs unless
when to use lest
lest used in a sentence
lest conjunction
lest definition
lest that meaning
conjunction
formal writing
to avoid
in order to prevent
in case
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
Lest that is not ironic enough, given Desmond's newsroom history, it also states: "You must be respectful towards your colleagues".
News & Media
"Lest that statement smack of bitterness, let me hasten to add that I'm not one bit ashamed of my reputation.
News & Media
Lest that seem too cruel to inflict on someone with a debilitating sleep disorder, Kirsty undergoes nine months of treatment first.
News & Media
Lest that were enough, he's also a spokesman for online retailer Buy.com and spends much of his time perfecting his act on the road.
News & Media
How else to be?" Lest that sound contradictory — remember Adorno — it is also part of the point.
News & Media
Lest that destiny be doomed by inequality, it is time we do better by, and for, all Americans, not just some of them.
News & Media
Lest that nice Republican go off the proverbial reservation, there is a ready-made prophylactic that can be stated in these simple words: "Don't be a sissy". This prophylactic is built into Republicans definitions of masculinity.
News & Media
Although Lanzkron is not currently in a lab, lest that period of stability suddenly end, she's worked in several over the course of her three years at MIT.
However, they are resisting tough action over its abuses lest that set an uncomfortable precedent over their own human-rights failings.
News & Media
Many city workers are fearful — and many spoke about it on the condition their names not be used, lest that put them higher on the layoff list.
News & Media
But lest that confuse our feelings about her, we learned in a passing bit of dialogue that the Taiwanese killer had been apprehended at O'Hare anyway.
News & Media
Expert writing Tips
Best practice
Use "lest that" to introduce a clause expressing a reason for avoiding an action, emphasizing the undesirable consequence you wish to prevent. For example: "They stayed silent, "lest that" their words be misconstrued".
Common error
Avoid using "lest that" in informal contexts or everyday conversations. It is better suited for formal writing and speeches where a sense of heightened caution or formality is desired.
Source & Trust
89%
Authority and reliability
4.6/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "lest that" functions as a subordinating conjunction, introducing a clause that expresses a reason for avoiding a certain action. It indicates a precautionary motive, as Ludwig AI confirms. The examples show it connecting ideas with a sense of potential negative consequence.
Frequent in
News & Media
70%
Academia
20%
Formal & Business
5%
Less common in
Science
3%
Encyclopedias
1%
Wiki
1%
Ludwig's WRAP-UP
In summary, "lest that" is a formal subordinating conjunction used to express a reason for avoiding an action, highlighting a potential negative consequence. Ludwig AI confirms its correct usage for expressing a warning or concern. It is most commonly found in news and academic writing. When using "lest that", ensure your writing maintains a formal tone. While grammatically sound, consider the context to avoid sounding overly formal or archaic. Alternatives include "for fear that", "in order to avoid", and "so as not to", providing options for varying your expression. Though "lest that" is widely used across numerous sources, being mindful of the intended audience is an element to improve your writing.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
for fear that
This alternative uses "for fear that" to convey the same sense of avoiding a potential negative outcome.
for the purpose of avoiding
This phrase is a more formal and emphatic way of expressing the intention to avoid something.
so as not to
This option uses "so as not to" to highlight the purpose of preventing a specific result.
with the intention of preventing
This alternative stresses the deliberate intent to prevent a specific outcome.
in order to avoid
This alternative shifts the focus to the intention of avoiding something, rather than the potential consequence.
to guard against
This phrase focuses on taking protective measures to avoid a potential negative outcome.
to prevent
This alternative directly emphasizes the act of prevention.
in the hope of averting
This option introduces the element of hope in preventing something negative.
in anticipation of preventing
This alternative emphasizes proactive prevention based on expectation.
to preclude the possibility of
This phrase is a more formal and sophisticated way of expressing the desire to avoid a specific outcome.
FAQs
How to use "lest that" in a sentence?
Use "lest that" to introduce a subordinate clause expressing a reason for avoiding a particular action. For example: "The general ordered a retreat, "lest that" his troops be surrounded".
What can I say instead of "lest that"?
You can use alternatives like "for fear that", "in order to avoid", or "so as not to" depending on the context.
What's the difference between "lest that" and "in case"?
"Lest that" implies a stronger sense of caution and a more formal tone than "in case". "Lest that" is used to avoid an undesirable outcome, while "in case" is a more general expression of preparedness.
Is "lest that" outdated?
"Lest that" is not outdated, but it is considered formal and somewhat archaic. While it's grammatically correct, its use might make your writing sound overly formal or old-fashioned in contemporary contexts.
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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
89%
Authority and reliability
4.6/5
Expert rating
Real-world application tested