練れん習しゅうを積つむ

expression, godan verb (-mu)

accumulate practice; put in practice; train extensively

Emphasizes building up experience through repeated, sustained practice over time. Often used when describing a long-term effort to improve a skill.

• 彼かれは毎まい日にちピアノの練れん習しゅうを積つんでいる。

  He practices the piano every day, steadily building his skill.

• 試し合あいに勝かつために、十じゅう分ぶんな練れん習しゅうを積つむ必ひつ要ようがある。

  To win the match, you need to put in enough practice.