troublemaker
🇺🇸
/ˈtrʌblmeɪkər/
🇬🇧
/ˈtrʌblmeɪkə(r)/
Someone who frequently causes problems or disturbances, often by stirring up disagreements or conflicts.
The new kid in class turned out to be a troublemaker, always starting fights and disrupting the peace.
クラスの新しい子はトラブルメーカーで、いつも喧嘩を始めたり、平和を乱したりしていた。