View synonyms for rigorous


[ rig-er-uhs ]


  1. characterized by rigor; rigidly severe or harsh, as people, rules, or discipline:

    rigorous laws.

    Synonyms: unyielding, stiff, inflexible, hard, austere, stern

    Antonyms: soft, flexible

  2. severely exact or accurate; precise:

    rigorous research.

    Synonyms: finical, demanding

    Antonyms: inaccurate

  3. (of weather or climate) uncomfortably severe or harsh; extremely inclement.

    Synonyms: bitter, hard

    Antonyms: mild

  4. Logic, Mathematics. logically valid.


/ ˈrɪɡərəs /


  1. characterized by or proceeding from rigour; harsh, strict, or severe

    rigorous discipline

  2. severely accurate; scrupulous

    rigorous book-keeping

  3. (esp of weather) extreme or harsh
  4. maths logic (of a proof) making the validity of the successive steps completely explicit

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Derived Forms

  • ˈrigorously, adverb
  • ˈrigorousness, noun

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Other Words From

  • rig·or·ous·ly adverb
  • rig·or·ous·ness noun
  • o·ver·rig·or·ous adjective
  • o·ver·rig·or·ous·ness noun
  • self-rig·or·ous adjective
  • sem·i·rig·or·ous adjective
  • sem·i·rig·or·ous·ness noun
  • un·rig·or·ous adjective
  • un·rig·or·ous·ness noun

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Word History and Origins

Origin of rigorous1

First recorded in 1350–1400; Middle English, from Medieval Latin rigōrōsus; rigor, -ous

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Synonym Study

See strict.

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Example Sentences

Thanks to our rigorous hourly backup process, our moderators were able to erase the damage and restore the campus quickly.

Surrogate sires would be classified as gene-edited animals by the Food and Drug Administration, meaning they’d face a rigorous approval process before their offspring could be sold for human consumption.

Instead of its typical rigorous review, the US Food and Drug Administration would give tests and treatments a different kind of temporary clearance to get them on the ground as soon as possible.

From Quartz

The real camera, called Mastcam-Z, has been through weeks of rigorous testing and calibration, and is probably up to the task.

Different businesses will require different levels of website performance, and rigorous multivariate testing helps marketers to see what online features offer varied results for users.

But Olds did more than build Nurse-Family Partnership; he did the rigorous evaluation to prove it would work.

All of this requires rigorous self-examination: When you can be anything you want to be, what do you want to be?

She had all the pressure of people in the spotlight and was unbelievably rigorous about keeping it real.

Turning the tide of the epidemic, he says, will require “rigorous contact, tracing, and quarantining.”

They are tight exercises in genre filmmaking, both formally rigorous and emotionally involving.

It is evident that the literal and rigorous practice of the Divine morality of the Christians would lead nations to ruin.

It is probable that parental and filial affection (piets) made this hardship less rigorous than it now seems to us (32, 33).

It has also been suggested that custom and piets had made this condition less rigorous than it seems to us.

Winston is rigorous in requiring what is due to his position—is, in some respects, a fearful formalist.

See p. 15 for a more rigorous statement concerning the volume.


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More About Rigorous

What does rigorous mean?

Rigorous is used to describe things characterized by rigor—strict discipline or severe exactness and precision.

Describing an experiment or study as rigorous means it was conducted with extreme precision in order to achieve accuracy.

Describing an athletic or academic program as rigorous means it is designed to be challenging and focused on strict discipline.

If a teacher is known for being rigorous, it means that they are very strict about things like students completing all of their work and following the rules exactly.

Example: The are the result of months of rigorous testing.

Where does rigorous come from?

The first records of the word rigorous come from the 1300s. It ultimately comes from the Latin rigēre, meaning “to be stiff.” The suffix -ous is used to form adjectives.

People and things described as rigorous are known for being inflexible when it comes to what is considered the exact right plan or course of action. For this reason, the word is associated with discipline, precision, accuracy, and high standards.

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What are some other forms related to rigorous?

  • rigorously (adverb)
  • rigorousness (noun)
  • rigor (noun)

What are some synonyms for rigorous?

What are some words that share a root or word element with rigorous

What are some words that often get used in discussing rigorous?

How is rigorous used in real life?

Rigorous is often used to describe things like experiments, testing, athletic training, and academic programs.

Try using rigorous!

Which of the following words is a synonym of rigorous?

A. rigid
B. exacting
C. precise
D. all of the above




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