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
indefatigable effort
Grammar usage guide and real-world examplesUSAGE SUMMARY
"indefatigable effort" is a correct and usable phrase in written English.
You can use it when you want to refer to a strenuous effort which is not easily broken or subdued, often despite difficulty or opposition. For example: "She made an indefatigable effort to finish the project on time."
✓ Grammatically correct
News & Media
Encyclopedias
Science
Alternative expressions(20)
untiring effort
relentless effort
unflagging effort
ceaseless effort
diligent effort
assiduous effort
unremitting effort
unwavering effort
unceasing effort
tenacious effort
unstinting effort
unswerving effort
incessant effort
unrelenting effort
endless sadness
constant application
long drawn out effort
vigorous exertion
unceasing commitment
unflagging dedication
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
5 human-written examples
With indefatigable effort and care, Dewey reformulated pragmatism, critically readjusting some of its conflicting doctrines, drawing upon his own work in psychology and education, and finding stimulation in the social pragmatism of his friend Mead.
Encyclopedias
A very proud Jew committed to the Sephardic tradition and a human being of great intellect he served our Congregation with extraordinary devotion and indefatigable effort involving himself in every aspect of leadership and accomplishment.
News & Media
Alongside that there is an indefatigable effort to find a musement in the world – there have been popular "Vice Guides" to everything from anal sex to Mecca – and a commitment to understanding, however brutally, or surreally, the margins of global culture.
News & Media
Sinn Fein, under Adams's controlling leadership, spent the best part of 15 years in an indefatigable effort to engage with the political and religious establishments in London, Dublin and Belfast, all of whom, he says, were hostile to constructive dealings for a variety of selfish or shortsighted reasons.
News & Media
Sensible people observe the basic rules of financial prudence: Expenditure must not exceed income, if possible; debt should be acquired reluctantly and liquidated as soon as can be; and, above all, there should be a continual and indefatigable effort to save and to invest sensibly.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
54 human-written examples
But sales of the book also testify to her indefatigable efforts to promote it.
News & Media
And without the indefatigable efforts of Mr. Marshall and a few other Internet writers, Mr. Lott's recent celebration of segregation would probably have been buried as well.
News & Media
He focused instead, as many in the church did, on the departing archbishop's indefatigable efforts to heal the church's bitter divisions on issues of gender and sexuality.
News & Media
He's created a co-crusader in the form of Nora, the head dinner lady from the first school he transformed - and Nora deserves a special award for her indefatigable efforts to pass on her new knowledge to everyone else.
News & Media
But sales of "Living History" also testify to Senator Clinton's own unusual, indefatigable efforts to promote it, stirring questions about the possible combination of competitive, political or financial ambitions behind her book tour.
News & Media
"But for government's money and supplies and Hussain's indefatigable efforts, there is not the slightest chance that the crimes charged would or even could have occurred," Susanne Brody, a federal defender, wrote in one of two filings in United States District Court.
News & Media
Expert writing Tips
Best practice
Use "indefatigable effort" when you want to emphasize the unwavering and tireless nature of someone's work.
Common error
While "indefatigable effort" is generally appropriate for formal writing, avoid using it excessively in informal contexts where simpler alternatives like "tireless work" might be more suitable.
Source & Trust
94%
Authority and reliability
4.2/5
Expert rating
Real-world application tested
Linguistic Context
The primary grammatical function of "indefatigable effort" is to act as a noun phrase where the adjective "indefatigable" modifies the noun "effort", emphasizing the quality of the effort. Ludwig AI confirms its correctness.
Frequent in
News & Media
60%
Encyclopedias
20%
Science
20%
Less common in
Formal & Business
0%
Wiki
0%
Academia
0%
Ludwig's WRAP-UP
In summary, "indefatigable effort" is a grammatically correct and usable phrase denoting a tireless and unwavering attempt. As highlighted by Ludwig, it is suitable for formal contexts where emphasis on persistent dedication is desired. While not exceedingly common, its use in news, encyclopedias, and scientific writing adds a layer of sophistication. When a more informal tone is appropriate, consider using synonyms like "untiring effort" or "relentless effort".
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
untiring effort
Replaces "indefatigable" with a synonym, maintaining a similar level of formality and meaning.
relentless effort
Emphasizes the persistence and determination behind the effort, possibly implying a forceful or aggressive approach.
unflagging effort
Highlights the continuous and unwavering nature of the effort, suggesting a steady and consistent pace.
ceaseless effort
Focuses on the uninterrupted nature of the effort, implying that it continues without breaks or pauses.
diligent effort
Emphasizes the care and conscientiousness applied to the effort, suggesting a thorough and meticulous approach.
assiduous effort
Similar to diligent, highlighting the persistent application of attention and energy.
unremitting effort
Suggests that the effort is maintained continuously, without any reduction in intensity or focus.
unwavering effort
Implies a steadfast and resolute commitment to the effort, despite any obstacles or challenges.
unceasing effort
Similar to ceaseless, but can sometimes imply a negative sense of something never ending.
tenacious effort
Highlights the determination and unwillingness to give up, even in the face of adversity.
FAQs
What does "indefatigable effort" mean?
The phrase "indefatigable effort" refers to an extremely persistent and tireless attempt to achieve something, characterized by unwavering dedication and energy.
How can I use "indefatigable effort" in a sentence?
You can use "indefatigable effort" to describe someone's dedication, for instance: "She showed "untiring effort" /s/in completing the project despite numerous setbacks.
What are some alternatives to "indefatigable effort"?
Some alternatives to "indefatigable effort" include phrases like "untiring effort", "relentless effort", or "unflagging effort", which convey similar meanings of persistent and unwavering exertion.
Is "indefatigable effort" formal or informal?
"Indefatigable effort" is generally considered a formal phrase, suitable for academic, professional, or news-related contexts. Simpler alternatives may be more appropriate for informal settings.
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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
94%
Authority and reliability
4.2/5
Expert rating
Real-world application tested