Where does “оптуорунньук” come from?

оптуорунньук (Yakut) comes from Russian вторник, from Old East Slavic въторьникъ, from Proto-Slavic vъtorьnikъ, from Proto-Slavic vъtorъ, from Proto-Indo-European wī-tero-, from Proto-Indo-European wi — apart, asunder; away from, against.

оптуорунньук (Yakut): Tuesday

Definitions

  1. Tuesday

Ancestry of “оптуорунньук”, step by step

StepLanguageWordMeaning
1RussianвторникTuesday
2Old East Slavicвъторьникъ
3Proto-SlavicvъtorьnikъAlternative form of *vъtorъkъ
4Proto-Slavicvъtorъsecond, secondary
5Proto-Indo-Europeanwī-tero-further apart
6Proto-Indo-Europeanwiapart, asunder; away from, against
Every word from Proto-Indo-European wiEvery word from Proto-Indo-European wī-tero-Every word from Proto-Slavic vъtorъ