Where does “leiðarstjarna” come from?

leiðarstjarna (Old Norse) comes from Proto-Germanic laidō, from Proto-Indo-European leyt-, from Proto-Indo-European lēy- — to leave, let; to want, desire; to let; leave...

Ancestry of “leiðarstjarna”, step by step

leiðarstjarna traces back through two separate lines of ancestry.

via Proto-Germanic laidō

StepLanguageWordMeaning
1Proto-Germaniclaidōa leading; a way, course, route, direction
2Proto-Indo-Europeanleyt-to scratch; to leave, die; to go, go forth, die
3Proto-Indo-Europeanlēy-to leave, let; to want, desire; to let; leave...

via Proto-Germanic sternǭ

StepLanguageWordMeaning
1Proto-Germanicsternǭstar
2Proto-Indo-Europeanh₂stḗrstar
3Proto-Indo-Europeanh₂eHs-to be/become dry; to burn, to glow; hearth
Every word from Proto-Indo-European lēy- →Every word from Proto-Indo-European leyt- →Every word from Proto-Germanic laidō →