合あいの手てを入いれる

expression, ichidan verb

chime in; interject; put in a word or gesture

Used when someone adds a comment, quip, or gesture during a pause in conversation, music, or performance. Often light or supportive, not a rude interruption.

• 彼かれの話はなしに合あいの手てを入いれて、場ばを和なごませた。

  I chimed in during his story and lightened the mood.

• 演えん奏そう中ちゅうに観かん客きゃくが合あいの手てを入いれるのはよくあることだ。

  It's common for the audience to interject during a performance.