IPA: /ˌpɒlɪˈfəʊnəs/
KK: /pɑlɪˈfoʊnəs/
Relating to or having multiple sounds or voices at the same time, often used in music to describe a style that involves several independent melodies.
The choir performed a polyphonous arrangement that filled the church with beautiful harmonies.
Polyphonous → It is formed from "poly-" (from Greek "polus", meaning many) and "phonous" (from Greek "phone", meaning sound). The word "polyphonous" means having many sounds or voices, often used in the context of music or harmony.
Think of 'many' ('poly-') sounds ('phone') coming together — that's what polyphonous means.