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
he is assiduous
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "he is assiduous" is correct and usable in written English.
You can use it to describe someone who is diligent and persistent in their work or efforts. Example: "In his studies, he is assiduous, always going the extra mile to ensure he understands the material thoroughly."
✓ Grammatically correct
News & Media
Encyclopedias
Wiki
Alternative expressions(5)
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
2 human-written examples
He may not have a lot to be personally vain about, but he is assiduous in cultivating those few areas where vanity is possible.
News & Media
He dismisses criticism that he ventures too close to the bounds of accepted conflict-of-interest practices, saying he is assiduous in making sure that he does not damage the interests of any clients.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
57 human-written examples
He was assiduous in courting conservative intellectuals (including hawkish Democrats).
News & Media
But he was assiduous in trying to build a consensus that he then presented.
News & Media
"He was assiduous in passing us this information," said Ubiratan Cazetta, a federal prosecutor in Pará.
News & Media
In 1760 Henry Cavendish was elected to both these groups, and he was assiduous in his attendance thereafter.
Encyclopedias
But his interests were wide; he was assiduous in assembling material, including inscriptions; and Polybius's charge of ignorance and willful dishonesty is unjust.
Encyclopedias
Yet he was assiduous in attending political rallies and meetings across the country – they occupied most weekends – and he never missed the Durham miners' gala where, he confessed, he always wept.
News & Media
The Duke spent William's reign in the House of Lords, where he was assiduous in his attendance.
Wiki
Taken in narrow terms, the BBC is assiduous when it comes to political balance.
News & Media
Its citizens can live and work across the EU, and it is assiduous about implementing directives from Brussels.
News & Media
Expert writing Tips
Best practice
Consider the context. While grammatically correct, "assiduous" can sound overly formal in casual conversation. Choose synonyms like "hardworking" or "dedicated" for informal settings.
Common error
Avoid using "he is assiduous" in casual conversation or informal writing. It may sound pretentious or unnatural. Opt for more common and relatable synonyms like "hardworking" or "dedicated".
Source & Trust
88%
Authority and reliability
4.4/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "he is assiduous" functions as a descriptive statement, attributing the quality of being diligent and persistent to a male subject. It is used to characterize someone's work ethic or approach to tasks, as exemplified by the Ludwig examples.
Frequent in
News & Media
35%
Encyclopedias
25%
Wiki
10%
Less common in
Science
10%
Formal & Business
10%
Reference
0%
Ludwig's WRAP-UP
In summary, the phrase "he is assiduous" is a grammatically correct and usable expression to describe someone who shows great care, attention, and persistence in their efforts. While Ludwig confirms its validity, it's important to note that the word "assiduous" carries a formal tone, making it more suitable for writing and formal speech than for casual conversations. More common synonyms like "hardworking" or "dedicated" might be better choices in informal settings. The phrase appears most frequently in news articles, encyclopedias and biographical contexts, indicating its appropriateness for describing individuals in a detailed and thoughtful manner.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
he is diligent
Replaces "assiduous" with a more common synonym, "diligent", maintaining the meaning of careful and persevering effort.
he is sedulous
Synonym replacement; "sedulous" is a less common but very close synonym to "assiduous", maintaining a formal tone.
he is hardworking
Substitutes "assiduous" with "hardworking", emphasizing the effort and labor involved.
he is conscientious
Uses "conscientious" instead of "assiduous", highlighting the moral aspect of being careful and thorough.
he is meticulous
Replaces "assiduous" with "meticulous", focusing on the attention to detail and precision.
he is painstaking
Replaces "assiduous" with "painstaking", focusing on the care and thoroughness, even if it takes considerable effort.
he is persevering
Substitutes "assiduous" with "persevering", emphasizing the persistence and determination to overcome obstacles.
he is dedicated
Uses "dedicated" instead of "assiduous", highlighting the commitment and devotion to a task or goal.
he is industrious
Replaces "assiduous" with "industrious", emphasizing the energy and productiveness in work.
he is tireless
Substitutes "assiduous" with "tireless", emphasizing the seemingly endless energy and effort applied.
FAQs
How can I use "he is assiduous" in a sentence?
You can use "he is assiduous" to describe someone who is diligent and persistent in their efforts. For example, "He is assiduous in his studies, always completing his assignments on time and with great care".
What are some alternatives to saying "he is assiduous"?
You can use alternatives like "he is diligent", "he is hardworking", or "he is dedicated" depending on the context.
Is "he is assiduous" formal or informal?
"He is assiduous" leans towards a more formal register. In casual settings, it may be more appropriate to use phrases like "he is hardworking" or "he is dedicated".
What does it mean when someone says "he is assiduous"?
When someone says "he is assiduous", it means they are describing someone as being very careful, persistent, and dedicated in their work or efforts. It implies a strong commitment and attention to detail.
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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
88%
Authority and reliability
4.4/5
Expert rating
Real-world application tested