polyacoustics

Etymology tree
Proto-Indo-European *pleh₁-
Proto-Indo-European *polh₁ús
Ancient Greek πολῠ́ς (polŭ́s)lbor.
English poly-
Proto-Indo-European *h₂eḱ-
Proto-Indo-European *h₂ew-
Proto-Indo-European *-s
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
Old English -as
Middle English -es
English -s
English acoustics
English polyacoustics
From poly- + acoustics.