psychoacoustic

The story

1. Ancient Greekψῡχή (psūkhḗ)
2. Ancient Greekψῡχο- (psūkho-)
3. Englishpsycho-
4. Proto-Indo-European*h₂eḱ-
5. Proto-Indo-European*h₂ew-
6. Proto-Indo-European*h₂ṓws
7. Proto-Indo-European*h₂ḱh₂owsyéti
8. Proto-Hellenic*akóuhō
9. Ancient Greekἀκούω (akoúō)
10. Ancient Greekᾰ̓κουστῐκός (ăkoustĭkós)
11. Medieval Latinacousticus
12. Englishacoustic
13. English todaypsychoacoustic

From psycho- + acoustic.