Where does “κατεβαίνω” come from?

κατεβαίνω (Greek) comes from Byzantine Greek κατεβαίνω, from Ancient Greek καταβαίνω, from Ancient Greek κᾰτᾰ-, from Ancient Greek κατά, from Ancient Greek καταστερίζω, from Ancient Greek ἀστήρ, from Proto-Hellenic astḗr, from Proto-Indo-European h₂stḗr — to be/become dry; to burn, to glow; hearth.

κατεβαίνω (Greek): to descend, go down

Definitions

to descend, go down

Ancestry of “κατεβαίνω”, step by step

Step	Language	Word	Meaning
1	Byzantine Greek	κατεβαίνω	—
2	Ancient Greek	καταβαίνω	to step down, to go or come down
3	Ancient Greek	κᾰτᾰ-	fully; down; denoting motion downwards
4	Ancient Greek	κατά
5	Ancient Greek	καταστερίζω	to place among the stars; I put among the stars
6	Ancient Greek	ἀστήρ	a celestial body; illustrious person; starfish
7	Proto-Hellenic	astḗr	star
8	Proto-Indo-European	h₂stḗr	star
9	Proto-Indo-European	h₂eHs-	to be/become dry; to burn, to glow; hearth

Every word from Proto-Indo-European h₂eHs- →Every word from Proto-Indo-European h₂stḗr →Every word from Proto-Hellenic astḗr →