一ひと役やく

noun

role; part; contribution

Refers to the role or contribution someone or something plays in a particular situation. Often used with verbs like 買う (to take on a role) or 果たす (to fulfill a role).

• 彼かれはプロジェクトで重じゅう要ような一ひと役やくを買かった。

  He took on an important role in the project.

• この発はつ明めいは技ぎ術じゅつの進しん歩ぽに一ひと役やく買かっている。

  This invention is playing a part in technological progress.