Where does “catiónico” come from?

catiónico (Portuguese) comes from Portuguese catião, from Ancient Greek κατιόν, from Ancient Greek κάτειμι, from Ancient Greek κᾰτᾰ-, from Ancient Greek κατά, from Ancient Greek καταστερίζω, from Ancient Greek ἀστήρ, from Proto-Hellenic astḗr — to be/become dry; to burn, to glow; hearth.

catiónico (Portuguese): cationic

Definitions

cationic

Ancestry of “catiónico”, step by step

Step	Language	Word	Meaning
1	Portuguese	catião	cation
2	Ancient Greek	κατιόν	going down
3	Ancient Greek	κάτειμι	to go down, come down
4	Ancient Greek	κᾰτᾰ-	fully; down; denoting motion downwards
5	Ancient Greek	κατά
6	Ancient Greek	καταστερίζω	to place among the stars; I put among the stars
7	Ancient Greek	ἀστήρ	a celestial body; illustrious person; starfish
8	Proto-Hellenic	astḗr	star
9	Proto-Indo-European	h₂stḗr	star
10	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 →