köken: Spread via the Lower Rhineland from Middle Low German dingesdach, dinsdach and Middle Dutch dinsendach (both with variants), and gradually replaced Middle High German ziestac and other High German forms like Alemannic German Zischtig or Bavarian Ertag. Only since the second half of the 17th. century is the modern form in common Script usage. Probably from Proto-Germanic *þingas-dagaz (“Day of…
köken: Related to Chuvash утлан (utlan, “to ride a horse”), also dialectal Bashkir and Tatar атланган күн (atlangan kün, “Tuesday; lit. horse riding day”), Eastern Mari кушкыжмо (kuškyžmo, “Tuesday; lit. horse riding day”). Perhaps from Volga Bulgar *اطلنروى كوان (atlanruwi küwen).
köken: Inherited from Old Galician-Portuguese terça feira (“Tuesday”), from Ecclesiastical Latin tertia fēria (“Tuesday”, literally “third weekday”); displaced earlier martes. Related to Galician terza feira and Mirandese terça-feira.
köken: From Hellenistic Koine Greek Τρίτη (Trítē) from τρίτος (trítos, “third”) with ellipsis of the feminine noun ἡμέρα (hēméra, “day”): "the third day after Saturday".
Tuesday (now generally considered the second day of the week in non-religious contexts in Sweden)
çekim: çoğul tisdagar · tamlayan tisdags
köken: From Old Swedish tisdagher, from an East Norse variant *tísdagr of Old Norse týsdagr, from Proto-West Germanic *Tīwas dag (the rounding of the *-ī- to -ý- due to the following *-w- is a West Norse development), a calque of Latin dies Martis.
köken: From két (“two”, probably referring to the second day after Sunday) + -ed (ordinal-forming suffix, currently -edik), with elision. Compare ketted (“half”, less common, more technical synonym of fél) and második (“second”).
Sino-Korean word from 火曜日, from 火曜 (“Mars”) + 日 (“day”), from Latin dies Martis (“day of Mars”), through Indian astrology in the fifth century as Sanskrit मङ्गलवार (maṅgalavāra, “of the planet Mars”) into Buddhist astrology in the eighth century as 火曜日.