Is "sound" a polyphonic word? Why is there only one sound in the dictionary?

Shadows, polyphonic characters. When reading y and n, they are generally nominal, such as dark, negative, yin, lunar calendar and vagina; When reading y √ n, it is usually verbal, such as shade, shade.

In these three words, the noun yin should be yin y and n.

The Pronunciation Table of Different Pronunciation Words in Putonghua defines "sound" as "yìn".

"Tree ~" and "forest ~ road" should be "shade" and "forest vagina"

So reading with Yin is the same.

I hope I can help you.