sound
From the root audi of Latin audiō (“I hear; I listen”) + -o-. Cognates include Proto-Germanic *awiz (“obvious”), Sanskrit आविस् (āvís, “manifestly, evidently”) and Ancient Greek αἰσθάνομαι (aisthánomai, “perceive, notice”) whence English aesthetic.
Practice speaking and memorizing "audio-" and many other words and sentences in English.