Where does “cathegra” come from?

cathegra (Vulgar Latin) comes from Latin cathēdra, from Ancient Greek καθέδρα, from Ancient Greek κατά, from Ancient Greek καταστερίζω, from Ancient Greek ἀστήρ, from Proto-Hellenic astḗr, from Proto-Indo-European h₂stḗr, from Proto-Indo-European h₂eHs- — to be/become dry; to burn, to glow; hearth.

Ancestry of “cathegra”, step by step

StepLanguageWordMeaning
1Latincathēdraarmchair (having cushions and supports)
2Ancient Greekκαθέδραseat; sitting posture; teacher's chair,...
3Ancient Greekκατά
4Ancient Greekκαταστερίζωto place among the stars; I put among the stars
5Ancient Greekἀστήρa celestial body; illustrious person; starfish
6Proto-Hellenicastḗrstar
7Proto-Indo-Europeanh₂stḗrstar
8Proto-Indo-Europeanh₂eHs-to be/become dry; to burn, to glow; hearth

Words derived from “cathegra

Every word from Proto-Indo-European h₂eHs-Every word from Proto-Indo-European h₂stḗrEvery word from Proto-Hellenic astḗr