足たしになる

expression, godan verb (-ru)

be of help; be useful; go toward

Used when something contributes to a need, such as money, food, or effort. Often appears in the form 足しになる or 足しにする.

• 少すこしでも足たしになればと思おもって、お米こめを持もってきました。

  I brought some rice, hoping it might be of some help.

• このお金かねが何なにかの足たしになれば嬉うれしいです。

  I'd be happy if this money could go toward something useful.