1. conduct or actions characterized by a lack of care for consequences; acting without regard for danger or safety
His reckless behavior on the highway endangered everyone around him.
Seu comportamento imprudente na estrada colocou em perigo todos ao seu redor.
2. irresponsible or careless conduct that shows disregard for rules, laws, or social norms
The teenager's reckless behavior resulted in serious consequences.
O comportamento imprudente do adolescente resultou em sérias consequências.