Where does “cadeirinha” come from?

cadeirinha (Portuguese) comes from Portuguese cadeira, from Old Portuguese cadeira, from Vulgar Latin cathegra, from Latin cathēdra, from Ancient Greek καθέδρα, from Ancient Greek κατά, from Ancient Greek καταστερίζω, from Ancient Greek ἀστήρ — to be/become dry; to burn, to glow; hearth.

Ancestry of “cadeirinha”, step by step

StepLanguageWordMeaning
1Portuguesecadeirachair
2Old Portuguesecadeira
3Vulgar Latincathegra
4Latincathēdraarmchair (having cushions and supports)
5Ancient Greekκαθέδραseat; sitting posture; teacher's chair,...
6Ancient Greekκατά
7Ancient Greekκαταστερίζωto place among the stars; I put among the stars
8Ancient Greekἀστήρa celestial body; illustrious person; starfish
9Proto-Hellenicastḗrstar
10Proto-Indo-Europeanh₂stḗrstar
11Proto-Indo-Europeanh₂eHs-to be/become dry; to burn, to glow; hearth

Words derived from “cadeirinha

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