Where does “tiistainen” come from?

tiistainen (Finnish) comes from Finnish tiistai, from Old Swedish tisdagher, from Old Norse týsdagr, from Proto-Germanic *Tīwas dag, from Latin dīēs Martis, from Latin diēs, from Proto-Italic djēm, from Proto-Italic *djous — to be bright; sky, heaven.

tiistainen (Finnish): having occurred on a Tuesday; pertaining to...

Definitions

  1. having occurred on a Tuesday; pertaining to...

Ancestry of “tiistainen”, step by step

tiistainen traces back through two separate lines of ancestry.

via Finnish tiistai

StepLanguageWordMeaning
1FinnishtiistaiTuesday
2Old SwedishtisdagherTuesday
3Old NorsetýsdagrTuesday
4Proto-Germanic*Tīwas dag
5Latindīēs MartisTuesday
6LatindiēsA day, particularly
7Proto-Italicdjēmaccusative singular of *djous
8Proto-Italic*djous
9Proto-Indo-Europeandyḗwssky, heaven; sky god
10Proto-Indo-Europeandyéwssky, heaven
11Proto-Indo-Europeandyew-to be bright; sky, heaven

via Finnish inen

StepLanguageWordMeaning
1Finnishinen
Every word from Proto-Indo-European dyew-Every word from Proto-Indo-European dyéwsEvery word from Proto-Indo-European dyḗws