instigator
🇺🇸
/ˈɪnstɪɡeɪtər/
🇬🇧
/ˈɪnstɪɡeɪtə(r)/
someone who starts something, like a trouble or event
The instigator of the argument was sent out of the room.
분쟁의 주도자가 방에서 내쫒겨졌다.