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Classic usage
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
Borrowed from Medieval Latin acousticus, acūsticus, from Ancient Greek ἀκουστῐκός (akoustĭkós, “of or for hearing”), from ἀκούω (akoúō, “to hear”) + -ῐκός (-ĭkós, adjectival suffix).
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Classic usage
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