• 勉強べんきょう — study
• 勉学べんがく — pursuit of learning
• 勤勉きんべん — diligence
• 勉励べんれい — hard work
• 勉力べんりょく — exerting effort
• 勉強家べんきょうか — studious person

勉 is composed of 免 (べん, as phonetic) and 力 (ちから, power). It conveys the idea of putting in effort to overcome something, often used in the context of studying or striving.

毎日まいにち勉強べんきょうを続つづけています。
I continue studying every day.

彼かれは とても勤勉きんべんな学生がくせいです。
He is a very diligent student.

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