Where does “psykofarmaka” come from?

psykofarmaka (Finnish) comes from German Psychopharmakon, from German psycho-, from Ancient Greek Ψυχή, from Ancient Greek δῆλος, from Proto-Indo-European dyew- — to be bright; sky, heaven.

Ancestry of “psykofarmaka”, step by step

Step	Language	Word	Meaning
1	German	Psychopharmakon	psychoactive drug
2	German	psycho-	psycho- relating to the soul, the mind, or to psychology
3	Ancient Greek	Ψυχή	Psyche
4	Ancient Greek	δῆλος	visible; conspicuous; manifest
5	Proto-Indo-European	dyew-	to be bright; sky, heaven

Every word from Proto-Indo-European dyew- →Every word from Ancient Greek δῆλος →Every word from Ancient Greek Ψυχή →