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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
indefatigably
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "indefatigably" is correct and usable in written English.
It can be used to describe someone who persists tirelessly or shows unwavering effort in their actions. Example: "She worked indefatigably on the project, ensuring every detail was perfect."
✓ Grammatically correct
News & Media
Encyclopedias
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
Lillian Ross sprinkles an early Miss America pageant with the gentle scorn it deserves—"Ah am smilin', Mama," says an indefatigably beatific Miss Florida while the bedraggled Miss New York State worries that she does not know how to display her talents.
News & Media
Further goodies included tax relief for high-end television and animation firms, vouchers enabling small businesses to buy advice and a devolved local growth fund the brainchild of Michael Heseltine, the indefatigably interventionist Tory grandee.In this section Ploughing ahead Over the Rubicon Forward to the past?
News & Media
Most teachers want to get rid of underperforming colleagues; most politicians want somebody to be responsible for schools; and most immigrants definitely want to learn.Mr Alonzo, for one, remains indefatigably optimistic.
News & Media
Everywhere he wrote, indefatigably tapping away on his old Olympia manual early in the mornings and deep into the weekends.
News & Media
She organized some 60 local and state Consumers' Leagues and traveled and spoke indefatigably for the cause.
Encyclopedias
Throughout the 1860s Taine indefatigably continued his researches and his writing.
Encyclopedias
She worked indefatigably for three years to supervise and to raise funds for the unit, which in 1922 was reorganized as the Hadassah Medical Organization.
Encyclopedias
Rolling news has made the scenes from Kuala Lumpur more affable, as we hear the giggles in the news conference over daft questions, the titbits about the co-pilot being cautioned for having "blondes up smoking with him in the cockpit", and Kay Burley in a crisp white shirt indefatigably searching for the truth.
News & Media
As corner shop beer cans were clanked together, the revelers then moved further down the high street where a PA system was set up that played nothing but Bowie hits, and the glut of fans - several of whom were sporting lightning bolt makeup and/or flamboyant costume - danced indefatigably to the timeless songs.
News & Media
He was so indefatigably brilliant that a week later, when he lined up against a formidable roll call of East Africans before the start of the 5,000, you were prompted to believe that never before had such a frail stature housed such an enormous heart.
News & Media
The Chilean-born, French-based, internationally nomadic director was indefatigably productive – his filmography lists 114 titles since the 1960s – and his fragmentary, fanciful oeuvre was like one vast sketchpad for recording images from a supremely fertile unconscious.
News & Media
Expert writing Tips
Best practice
Use "indefatigably" to add a sense of profound dedication and tireless effort to your writing. It's particularly effective when describing someone overcoming significant obstacles or pursuing a demanding goal with unwavering commitment.
Common error
Avoid using "indefatigably" in casual conversation or informal writing. Its formality can sound unnatural or pretentious in settings where simpler synonyms like "tirelessly" or "relentlessly" would be more appropriate.
Source & Trust
89%
Authority and reliability
4.6/5
Expert rating
Real-world application tested
Linguistic Context
The primary grammatical function of "indefatigably" is as an adverb, modifying verbs, adjectives, or other adverbs to describe the manner in which an action is performed. Ludwig shows this use across many contexts, denoting tireless and persistent effort.
Frequent in
News & Media
51%
Encyclopedias
12%
Formal & Business
6%
Less common in
Science
6%
Academic
0%
Social Media
0%
Ludwig's WRAP-UP
In summary, "indefatigably" is a grammatically correct adverb that signifies doing something in an extremely persistent and untiring manner. As confirmed by Ludwig, it is most suitable for formal contexts, such as news articles and encyclopedic entries, where its strong emphasis on dedication and tireless effort is most effective. While synonyms like "tirelessly" exist, "indefatigably" provides a more sophisticated and emphatic alternative. Overusing it in informal settings, however, can sound unnatural. To best use this adverb, aim for situations where you wish to highlight unwavering commitment and resilience in a concise yet impactful way. Ludwig provides numerous examples to illustrate its proper usage.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
tirelessly
This is a direct synonym, replacing "indefatigably" with a more common and simpler word.
unflaggingly
Similar to "tirelessly", but emphasizes a lack of decrease in enthusiasm or energy.
persistently
Focuses on the continuous nature of the effort, highlighting determination.
unremittingly
Emphasizes the relentless and unwavering nature of the effort.
assiduously
Highlights the diligence and care put into the effort.
diligently
Similar to "assiduously", stressing attentiveness and conscientiousness.
zealously
Emphasizes the enthusiastic and passionate nature of the effort.
with unwavering dedication
Replaces the single adverb with a prepositional phrase, adding emphasis to the commitment.
without respite
Highlights the continuous nature of the activity, lacking any breaks or pauses.
with tireless effort
This phrase emphasizes the substantial effort expended, conveying a sense of dedication and perseverance.
FAQs
How can I use "indefatigably" in a sentence?
"Indefatigably" is an adverb that describes doing something in a tireless and persistent manner. For example: "She worked indefatigably to complete the project on time" or "He searched indefatigably for a solution to the problem."
What words are similar to "indefatigably"?
Synonyms for "indefatigably" include "tirelessly", "unflaggingly", "persistently", and "relentlessly". The best choice depends on the specific nuance you want to convey.
Is it appropriate to use "indefatigably" in formal writing?
Yes, "indefatigably" is well-suited for formal writing. It adds a strong sense of dedication and perseverance and is often found in news articles, academic papers, and encyclopedic entries.
What's the difference between "indefatigably" and "enthusiastically"?
"Indefatigably" emphasizes the tireless and persistent nature of an action, while "enthusiastically" highlights the passion and excitement behind it. One can work indefatigably without being enthusiastic, and vice versa.
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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