出典:Wiktionary
出典:『Wiktionary』 (2026/04/27 23:39 UTC 版)
From earlier rōbus (with change of nominative after the pattern of iecur), from Proto-Italic *rouβos, from Proto-Indo-European *h₁rewdʰ- (“red”), named for its reddish hardwood and thus cognate to ruber.
rōbur n (genitive rōboris); third declension
Third-declension noun (neuter, imparisyllabic non-i-stem).