rigor

When a school boasts of its academic rigor, it means its students learn a lot and work really hard. Rigor means thoroughness and exhaustiveness––the gold standard for a good teacher.

You may have heard of "rigor mortis"––which is a medical term describing the stiffness of a body after death. Rigor used to mean stiffness outside of the corpse context, i.e., sternness. The word changes meaning along with our changing standards for what we want teachers to be.

Definitions of rigor
1

n excessive sternness

“the rigors of boot camp”
Synonyms:
hardness, harshness, inclemency, rigorousness, rigour, rigourousness, severeness, severity, stiffness
Type of:
sternness, strictness
uncompromising resolution

n something hard to endure

Synonyms:
asperity, grimness, hardship, rigorousness, rigour, rigourousness, severeness, severity
Types:
sternness
the quality (as of scenery) being grim and gloomy and forbidding
Type of:
difficultness, difficulty
the quality of being difficult

n the quality of being valid and rigorous

Synonyms:
cogency, rigour, validity
Type of:
believability, credibility, credibleness
the quality of being believable or trustworthy

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