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
be rigorously observed
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "be rigorously observed" is correct and usable in written English.
It can be used in contexts where strict adherence to rules, guidelines, or protocols is required. Example: "All safety protocols must be rigorously observed to ensure the well-being of all employees."
✓ Grammatically correct
News & Media
Science
Encyclopedias
Alternative expressions(14)
be strictly adhered to
be closely monitored
be faithfully executed
be strictly followed
be vigilantly observed
be meticulously observed
be strictly adhered.
adhere to
be closely followed
be faithfully complied with
be meticulously followed
be precisely followed.
be consistently enforced
must be strictly adhered to
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
The criteria for joining a functioning democracy and market economy, the ability to apply the EU's rules, strong independent institutions, the rule of law must be rigorously observed, as they have not always been for other candidates.
News & Media
"We need to play it like it's real and ensure that should the worst happen, our response is effective and well-co-ordinated". The teams' response would be "rigorously observed" by independent evaluators so lessons can be learned from the exercise, he said.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
58 human-written examples
Sexual segregation was rigorously observed.
News & Media
In the shadow of Munich's cathedral you'll find Nürnberger Bratwurst Glöckl am Dom, a restaurant where all the decorative clichés of Bavarian culture are rigorously observed.
News & Media
In a society where class differences were rigorously observed and opportunities for ambitious women virtually nonexistent, a career as royal mistress, for all its liabilities, was one of the few worth pursuing.
News & Media
Procedures to prevent specimen contamination and PCR carryover were rigorously observed at all stages.
In spite of intelligence from all quarters that the German army was massing for attack, a special Moscow announcement on June 14 , 1941 asserted that both parties were rigorously observing their pact.
Encyclopedias
Nevertheless, these terminological distinctions were not always rigorously observed.
Science
James Rule will focus on the limits of official privacy protection policy, identifying issues and challenging us to think about what remains uncomfortably unresolved, even if the consensual "fair information practices" were rigorously and universally observed.
This improved accuracy has been rigorously proved and observed in numerical studies [11].
Science
They therefore need to be rigorously monitored.
News & Media
Expert writing Tips
Best practice
Use "be rigorously observed" when emphasizing the necessity of strict adherence to rules, procedures, or customs. It conveys a sense of importance and precision.
Common error
While "be rigorously observed" is grammatically correct, overusing passive voice can make writing sound weak. Consider rephrasing to an active voice when appropriate, such as "authorities rigorously observe" to make the sentence more direct and impactful.
Source & Trust
89%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "be rigorously observed" functions as a passive construction, indicating that a subject receives the action of being observed. It is commonly used to emphasize the importance and strictness of adherence to rules, procedures, or standards. As confirmed by Ludwig, the phrase is grammatically correct and suitable for use.
Frequent in
News & Media
33%
Science
33%
Encyclopedias
17%
Less common in
Formal & Business
8%
Academia
8%
Wiki
0%
Ludwig's WRAP-UP
In summary, the phrase "be rigorously observed" is a grammatically sound and uncommon expression used to stress the importance of strictly following rules or procedures. According to Ludwig, the phrase is correct and usable in written English. Its usage is commonly found in formal contexts, but it can also appear in neutral ones such as news reports. When writing, consider whether the passive voice is the most effective choice, or whether an active construction would be more impactful. While alternatives like "be strictly adhered to" or "be carefully followed" exist, "be rigorously observed" specifically emphasizes the thoroughness and precision of the observation. The context should be considered when assessing the best choice.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
be strictly adhered to
Replaces "rigorously observed" with "strictly adhered to", focusing on adherence to rules or guidelines.
be closely monitored
Emphasizes the act of monitoring rather than strict observation.
be carefully followed
Highlights the careful execution of a process or instruction.
be thoroughly enforced
Focuses on the enforcement aspect, suggesting that rules are not only observed but also actively enforced.
be diligently maintained
Highlights the effort to maintain a certain standard or condition with diligence.
be meticulously implemented
Focuses on the careful and detailed implementation of a plan or procedure.
be faithfully executed
Emphasizes the faithful and accurate execution of a task or order.
be consistently upheld
Highlights the consistent upholding of a principle or standard.
be attentively regarded
Focuses on the attentive consideration and respect given to something.
be scrupulously respected
Emphasizes the scrupulous respect and adherence to rules or customs.
FAQs
How can I use "be rigorously observed" in a sentence?
You can use "be rigorously observed" to describe rules, procedures, or protocols that must be strictly followed. For example, "All safety protocols must "be rigorously observed" to ensure the well-being of all employees."
What are some alternatives to "be rigorously observed"?
Alternatives include phrases like "be strictly adhered to", "be closely monitored", or "be carefully followed". The best choice depends on the specific context.
Is it better to use active or passive voice with "observe"?
It depends on the context. "Be rigorously observed" (passive) emphasizes the object being observed, while "Rigorously observe" (active) emphasizes the observer and their action. Choose the voice that best suits the intended focus of your sentence.
What does "rigorously" mean in the phrase "be rigorously observed"?
In this context, "rigorously" means strictly, thoroughly, and meticulously. It emphasizes that the observation is not casual but rather precise and exacting.
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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
4.5/5
Expert rating
Real-world application tested