существительное “effort”
ед. effort, мн. efforts или неисч.
- усилие
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She put in a great effort to pass her final exams with high marks.
- старание
Her effort to learn French finally paid off when she was able to converse fluently with the locals in Paris.
- мероприятие (в контексте достижения цели)
The community's cleanup effort made the park beautiful again.