Where does “psykoteknillinen” come from?

psykoteknillinen (Finnish) comes from Finnish psyko-, from Ancient Greek Ψυχή, from Ancient Greek δῆλος, from Proto-Indo-European dyew- — to be bright; sky, heaven.

Ancestry of “psykoteknillinen”, step by step

Step	Language	Word	Meaning
1	Finnish	psyko-	psycho-
2	Ancient Greek	Ψυχή	Psyche
3	Ancient Greek	δῆλος	visible; conspicuous; manifest
4	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 →