Interfere/ˌɪntərˈfɪr/ Definition 1 of 4Pro Tip 1/3Unwelcome Involvement Using 'interfere' suggests negative feelings about someone's uninvited involvement. When you interfered in my discussion, it derailed the topic. Pro Tip 2/3Boundaries Respect 'Interfere' implies crossing personal boundaries without consent. Please don't interfere with my relationships. Pro Tip 3/3Negative Outcome Often suggests that the action causes problems or conflicts. Her interfering only made the situation worse.