rigorous.
Showing, causing, or favoring rigour/rigor; scrupulously accurate or strict; thorough.
Meaning & usage
Showing, causing, or favoring rigour/rigor; scrupulously accurate or strict; thorough.
Severe; intense.
a rigorous winter
Where this word comes from
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.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.