IPA: //vɔɪˈjʊə.rɪ.zəm//
KK: /vɔɪˈjʊrɪzəm/
The act of gaining pleasure or satisfaction from watching others, often in a secretive way, especially when they are unaware and may be in private situations.
His voyeurism led him to install cameras in places where he could secretly observe others without their consent.
Voyeurism is formed from "voyeur" (from French, meaning one who sees) and "-ism" (a suffix used to denote a practice or system). The term refers to the practice of gaining sexual pleasure from watching others when they are naked or engaged in sexual activity.
Think of a 'voyeur' as someone who 'sees' and the '-ism' indicating a practice. This helps you remember that voyeurism is about the practice of watching others.