出典:Wiktionary
出典:『Wiktionary』 (2026/01/06 23:07 UTC 版)
From Proto-West Germanic *sidu, from Proto-Germanic *siduz (“custom”), from Proto-Indo-European *swedʰ- (“custom, habit”). Cognate with Old Frisian side (“custom”), Old Saxon sidu (“custom”), Old High German situ (“custom”), Old Norse siðr (“custom, habit; conduct”). Related to 古期英語 ġesidian (“to arrange, order, set right”).
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