Bellissimo! is not a word one would use to describe business in New York City since the pandemic struck — unless you’re talking about Arthur Avenue in the Bronx.

The stretch of roughly 12 blocks that encompass the Bronx’s Little Italy — known for its cured meats, cheese blocks and other Italian delicacies — has become a shopping oasis for cooped-up metropolitan area residents with money to spend, The Post has learned. And that’s helping fuel a spate of new businesses at a time when most city restaurants are struggling to survive, including six new restaurant openings or expansions, sources said.