運うん動どう力りょく

noun

impetus; driving force; momentum

Refers to the force or energy that sets something in motion or drives an activity forward. Often used in abstract contexts such as social movements, projects, or personal motivation.

• 彼かれの情じょう熱ねつがプロジェクトの運うん動どう力りょくとなった。

  His passion became the driving force behind the project.

• 社しゃ会かい改かい革かくの運うん動どう力りょくは若わか者ものの声こえだ。

  The impetus for social reform is the voice of the youth.