This is the 577th most frequent Chinese word.
歌
"Song" or "to sing."
Here, "歌" is used as part of the word "歌曲", indicating songs in general.
我喜欢听歌曲。
I like listening to songs.
In this instance, "歌" represents a single song being sung.
他唱了一首动听的歌。
He sang a beautiful song.
Here, "歌" is used to refer to a composed piece of music or lyrics.