出典:Wiktionary
出典:『Wiktionary』 (2026/02/24 21:53 UTC 版)
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| Cardinal: fiftene Ordinal: fiftenthe, fiftethe |
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Inherited from 古期英語 fiftēoþa, from Proto-West Germanic *fimftō tehundō, itself from Proto-Germanic *fimftô tehundô; by surface analysis, fyf (“five”) + tithe (“tenth, tithe”).