The teacher slowly pronounces the words to make sure all students can hear clearly.

pronounces 是动词 pronounce 的第三人称单数形式。pronounce 由前缀 pro-（表示"向前"）和词根 nounce（来自拉丁语 nuntiare，意为"宣布"）组成，本义是"清晰地发出声音"，特指"发音、朗读"。