interloper
🇺🇸
/ˈɪntərləʊpər/
🇬🇧
/ˈɪntələʊpə(r)/
Someone who enters or becomes involved in a situation where they are not supposed to be.
The security guard escorted the interloper off the premises.
경비원이 침입자를 현장에서 쫓아냈다.