力ちからを合あわせる

expression, ichidan verb

join forces; cooperate; work together

Used when multiple people or groups combine their efforts toward a common goal. Often implies pooling strength or resources.

• みんなで力ちからを合あわせて、この問もん題だいを解かい決けつしよう。

  Let's all join forces and solve this problem.

• 地ち域いきの人ひとたちが力ちからを合あわせて祭まつりを成せい功こうさせた。

  The local people worked together to make the festival a success.