The story
- Englishvestibulo-
- Proto-Indo-European*h₂eḱ-
- Proto-Indo-European*h₂ew-
- Proto-Indo-European*h₂ṓws
- Proto-Indo-European*h₂ḱh₂owsyéti
- Proto-Hellenic*akóuhō
- Ancient Greekἀκούω (akoúō)
- Ancient Greekᾰ̓κουστῐκός (ăkoustĭkós)
- Medieval Latinacousticus
- Englishacoustic
- English todayvestibuloacoustic
From vestibulo- + acoustic.
Etymology from Wiktionary, CC BY-SA 4.0.