役やくに立たつ

expression, godan verb (-tsu)

be helpful; be useful; serve a purpose

Common expression for something or someone being of practical use or assistance. Often used in the pattern ～の役に立つ or ～に役立つ.

• この辞じ書しょは日本にほん語ごの勉べん強きょうの役やくに立たつ。

  This dictionary is useful for studying Japanese.

• 彼かれのアドバイスがとても役やくに立たった。

  His advice was very helpful.