expression, godan verb (-mu)
work hard at one's studies; apply oneself to one's lessons
A set phrase meaning to diligently engage in study or schoolwork. Often used in educational or self-improvement contexts.
彼は毎日遅くまで勉強に励んでいる。
He works hard at his studies until late every day.
試験に合格するために、勉
Please apply yourself to your studies in order to pass the exam.