出典:Wiktionary
出典:『Wiktionary』 (2025/11/15 18:13 UTC 版)
Inherited from 中期英語 rigorous, from Middle French and Anglo-Norman rigoreus, derived from Late Latin rigōrōsus (stiff, rigid; inflexible). By surface analysis, rigor + -ous.
rigorous (comparative more rigorous, superlative most rigorous)
Although British English has rigour vs. American English rigor, rigorous is spelled thus in all varieties of English.
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