otoacoustic

Etymology tree
Proto-Indo-European *h₂ew-
Proto-Indo-European *-s
Proto-Indo-European *h₂ṓws
Ancient Greek οὖς (oûs)
Ancient Greek ὠτ- (ōt-)der.
English ot-
Ancient Greek -ο- (-o-)der.
Latin -o-bor.
English -o-
English oto-
Proto-Indo-European *h₂eḱ-
▲
Proto-Indo-European *h₂ṓws
Proto-Indo-European *-yéti
Proto-Indo-European *h₂ḱh₂owsyéti
Proto-Hellenic *akóuhō
Ancient Greek ἀκούω (akoúō)
Proto-Indo-European *-kos
Ancient Greek -κός (-kós)
Ancient Greek -ῐκός (-ĭkós)
Ancient Greek ᾰ̓κουστῐκός (ăkoustĭkós)bor.
Medieval Latin acousticusbor.
English acoustic
English otoacoustic
From oto- + acoustic.