biznis

1. business; commerce
   Bavi se biznisom već deset godina. — He has been in business for ten years.
   U ovom gradu biznis ide sve teže. — Business is getting harder and harder in this town.
2. a business; one's own company
   Otvorila je svoj biznis u centru grada. — She opened her own business in the city centre.
3. colloq. business venture; deal
   Ušli su zajedno u unosan biznis. — They went into a lucrative business venture together.

Formal texts often use "poslovanje" or "preduzetništvo", depending on the meaning; "biznis" sounds more casual. "Privreda" refers to the economy as a whole.