研けん鑽さんを積つむ

expression, godan verb (-mu)

apply oneself to one's studies; devote oneself to study; pursue one's studies with dedication

A formal expression for diligent, sustained effort in academic or professional study and research. Often used in contexts of self-improvement or scholarly pursuit.

• 彼かれは毎まい日にち、研けん鑽さんを積つんで医い者しゃになった。

  He applied himself to his studies every day and became a doctor.

• 語ご学がく力りょくを高たかめるために、日ひ々び研けん鑽さんを積つんでいる。

  I am devoting myself to study daily in order to improve my language skills.