Where does “*thiustri” come from?

*thiustri (Old High German) comes from Proto-West Germanic þiustrī, from Proto-West Germanic þimstr, from Proto-Germanic þimstraz, from Proto-Indo-European témH-s-ro-s, from Proto-Indo-European temH- — dark.

Ancestry of “*thiustri”, step by step

StepLanguageWordMeaning
1Proto-West Germanicþiustrīdark, gloomy
2Proto-West Germanicþimstrdark, dusky
3Proto-Germanicþimstraz
4Proto-Indo-EuropeantémH-s-ro-s
5Proto-Indo-EuropeantemH-dark

Words derived from “*thiustri

Every word from Proto-Indo-European temH-Every word from Proto-Indo-European témH-s-ro-sEvery word from Proto-Germanic þimstraz