expression, godan verb (-mu)
work diligently; apply oneself to one's work
A somewhat formal or literary expression meaning to devote oneself earnestly to one's job or tasks.
彼は毎日遅くまで仕事に勤しんでいる。
He works diligently until late every day.
新しいプロジェクトに参加し
Since joining the new project, I have been applying myself to my work even more.