a person who gets sexual pleasure from secretly watching other people in sexual situations, or (more generally) a person who watches other people's private lives

I felt like a voyeur visiting the war zone and seeing badly injured people being dragged from their bomb-shattered homes. 我在战区看到身受重伤的人们被从炸毁的家园中拖出来时，感觉自己就像个偷窥者。