Where does “styrdher” come from?

styrdher (Old Swedish) comes from Old Norse stirðr, from Proto-Germanic sterþjaz, from Proto-Indo-European ster — strong, steady.

Ancestry of “styrdher”, step by step

StepLanguageWordMeaning
1Old Norsestirðr—
2Proto-Germanicsterþjaz—
3Proto-Indo-Europeansterstrong, steady
Every word from Proto-Indo-European ster →Every word from Proto-Germanic sterþjaz →Every word from Old Norse stirðr →