出典:Wiktionary
出典:『Wiktionary』 (2026/02/24 22:08 UTC 版)
A remodelling of fiftethe (古期英語 fīftēoþa) on the basis of tenthe (“tenth”); by surface analysis, fiftene (“fifteen”) + -the (ordinal suffix). For Northern 中期英語 forms with /d/, compare Old Norse fimmtándi, fimmtjándi.
fīftēoþa is from Proto-West Germanic *fimftō tehundō, itself from Proto-Germanic *fimftô tehundô.
fiftenthe