Added 9 October 2026
rigorous
/ˈɹɪɡəɹəs/ adjective
In Latin: rigorosus Wiktionary
adjective Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about rigorous at Wordnik → Where our words come from →
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Rigidly accurate; allowing no deviation from a standard.
rigorous application of the law
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Demanding strict attention to rules and procedures.
rigorous discipline
Origin
Inherited from Middle English rigorous, from Middle French and Anglo-Norman rigoreus, derived from Late Latin rigōrōsus (stiff, rigid; inflexible). By surface analysis, rigor + -ous.
From Wiktionary, via Kaikki.org (CC BY-SA)