midsummer

From Middle English midsomer, midsumer, from Old English midsumer, midsumor (“midsummer”), from Proto-West Germanic *midisumar, from Proto-Germanic *midjasumaraz (“midsummer”), equivalent to mid- + summer. Cognate with West Frisian midsimmer (“midsummer”), Dutch midzomer (“midsummer”), German Mittsommer (“midsummer”), Danish midsommer (“midsummer”), Swedish midsommar (“midsummer”), Icelandic miðsumar (“midsummer”).

出典: Wiktionary「midsummer」（CC BY-SA 4.0）