The CD player in my car is broken, so now I have to use my phone to listen to music.

CD player 是由 CD（Compact Disc 的缩写，指"光盘"）和 player（"播放器"）组成的复合名词，指"光盘播放器"。 player 来自动词 play（"播放"）加后缀 -er 构成的名词，表示"播放的设备"。 CD player 特指用于播放音乐光盘的设备。