köken: From Middle High German mittewoche, from Old High German mittawehha (literally “middle of the week”), calqued on Ecclesiastical Latin media hebdomas (whence Dalmatian misedma). Equivalent to Mitte (“mid, middle”) + Woche (“week”), becoming a masculine in Early Modern German after the other weekdays. Compare Middle Low German middewēke, English midweek. Originally meaning the middle between Sunday…
köken: Inherited from Latin diēs Mercurī, with ellipsis of "day", dissimilation of R-L and the ending analogically reshaped after most other days of the week.
köken: Inherited from Hellenistic Koine Greek Τετάρτη (Tetártē) from τέταρτος (tétartos, “fourth”) with ellipsis of the feminine noun ἡμέρα (hēméra, “day”): "the fourth day after Saturday".
Wednesday (now generally considered the third day of the week in non-religious contexts in Sweden)
çekim: çoğul onsdagar · tamlayan onsdags
köken: The word is originally a short form for Odens dag, meaning day of Oden. (Note: "Oden" and "Odin" are alternative spellings of the same name.) From Old Swedish oþinsdagher, from Old Norse óðinsdagr (“Odin's day”), from Proto-West Germanic *Wōdanas dag.
köken: Etymology tree Proto-Indo-European *ḱerd- Proto-Balto-Slavic *śerd- Proto-Slavic *serdà Old Polish śrzoda Polish środa Inherited from Old Polish śrzoda.
Wednesday (day of the week; the third day of the week in Finland and in the ISO 8601 standard)
çekim: çoğul keskiviikot · tamlayan keskiviikon
köken: keski- (“mid-, middle”) + viikko (“week”), a calque either of Middle Low German middewēke (compare modern German Mittwoch), or of a seemingly unattested Old Swedish word (compare Old Norse miðvikudagr (literally “mid-week day”)). Note that Wednesday was the middle of the seven-day week when Sunday was still the first day of the week in Finland prior to 1973.
köken: Borrowed from Proto-Slavic *serdà (“middle”, from the idea of "middle of the week"). Compare Serbo-Croatian sreda, Slovene sreda, Bulgarian сря́да (srjáda). Cognate with English heart.
aile: szerdai, hamvazószerda
Etimoloji
Inherited from Old Galician-Portuguese quarta feira, from Ecclesiastical Latin quārta fēria (“Wednesday”, literally “fourth weekday”).