1. sustained or extended work, labor, or attempt that continues over a long period of time
The project required prolonged effort from the entire team over several months.
O projeto exigiu esforço prolongado de toda a equipe durante vários meses.
2. continuous dedication and persistence in achieving a goal despite difficulties
Through prolonged effort, she finally mastered the difficult language.
Através de esforço prolongado, ela finalmente dominou a língua difícil.