interfere interfere /ˌɪnɝˈfɪr/

verb

1. () Come between so as to be hindrance or obstacle  ( interfere )
   come between so as to be hindrance or obstacle
    Your talking interferes with my work!
   Your talking interferes with my work!
   
2. () Get involved, so as to alter or hinder an action, or through force or threat of force  ( interpose , step in , interfere , intervene )
   get involved, so as to alter or hinder an action, or through force or threat of force
    Why did the U.S. not intervene earlier in WW II?
   Why did the U.S. not intervene earlier in WW II?