経けい験けんを積つむ

expression, godan verb (-mu)

gain experience; accumulate experience

Common expression for building up practical experience over time, often through work or repeated practice.

• 新あたらしい仕し事ごとで経けい験けんを積つみたい。

  I want to gain experience in my new job.

• 彼かれは長なが年ねんの経けい験けんを積つんで、専せん門もん家かになった。

  He accumulated years of experience and became an expert.