interloper

1. N-COUNT If you describe someone as an interloper, you mean that they have come into a situation or a place where they are not wanted or do not belong. 闯入者[表不满]

She had no wish to share her father with any outsider and regarded us as interlopers. 她不想与任何外人分享她的父亲并把我们视为闯入者。