This is the 12550th most frequent Polish word.
napracować
To work hard or put in a lot of effort.
In this sentence, 'napracować' is used to express the speaker's significant effort to accomplish an objective.
Musiałem się napracować, aby osiągnąć ten cel.
I had to put in a lot of effort to achieve this goal.
Here, 'napracować' indicates substantial hard work invested in a task.
Napracowaliśmy się nad projektem, ale jesteśmy zadowoleni z wyników.
We worked hard on the project, but we are satisfied with the results.
In this example, 'napracować' conveys the necessity of considerable effort to achieve mastery.