nefarious
🇺🇸
/nɪˈferiəs/
🇬🇧
/nɪˈfeəriəs/
Very wicked and involving evil actions
The nefarious plot was uncovered by the authorities, leading to the arrest of the masterminds.
悪辣な陰謀が当局によって発覚し、主謀の逮捕につながりました。