cattivi
Cattivi is the masculine plural form of the Italian adjective cattivo, meaning "bad" or "evil." The feminine plural is cattive; the singular forms are cattivo (masculine) and cattiva (feminine). It is used to describe people, actions, or objects judged morally wrong or of poor quality. The word carries both moral and evaluative senses and is common in everyday speech.
Cattivo agrees in gender and number with the noun: un ragazzo cattivo, due ragazzi cattivi; una ragazza
Context and nuance: cattivo is a general, everyday descriptor. Malvagio is stronger and emphasizes moral wickedness,
Etymology: the exact origin is uncertain; cattivo is a long-attested native Italian word with Romance-language roots.
The plural noun usage "i cattivi" is common when referring to a group of antagonists or “the