This is the 3234th most frequent Japanese word.
奮闘
"Strenuous effort" or "struggle."
In this context, "奮闘" (funtō) expresses the action of devotedly striving to accomplish a challenging task.
彼は仕事の締め切りに間に合わせるため、夜遅くまで奮闘しました。
He struggled hard to meet the work deadline, working late into the night.
Here, "奮闘" conveys continuous effort and struggling towards a personal academic goal.
試験に合格するため、彼女は毎日勉強に奮闘している。
She is striving every day in her studies to pass the exam.
In this example, "奮闘" illustrates making significant effort in learning or mastering a new skill.