勢いきおいづく

godan verb (-ku), intransitive verb

gain strength; gather momentum; be encouraged

Describes a person, group, or movement becoming more energetic, confident, or powerful, often after a positive trigger. Can refer to both physical vigor and emotional uplift.

• 彼かれは応おう援えんされて勢いきおいづいた。

  He was encouraged by the support and gained momentum.

• チームは一いっ点てん取とってから勢いきおいづいた。

  The team gained momentum after scoring a point.