This is the 5232nd most frequent Japanese word.
頑張る
To persevere or do one's best.
Here, '頑張る (ganbaru)' conveys an active effort and determination in studying and preparing for an exam.
試験の準備を頑張っています。
I am working hard on preparing for the exam.
In this usage, '頑張る (ganbaru)' is used to encourage someone to persevere and continue their effort during the marathon.
明日のマラソン大会では最後まで頑張ってください。
Please do your best in tomorrow's marathon.
Here, '頑張る (ganbaru)' refers to a collective effort, emphasizing teamwork and shared determination.