口くちを開ひらく

expression, godan verb (-ku)

open one's mouth (to talk); start to tell

Used when someone begins to speak, often after a silence or hesitation. Can imply revealing something or finally speaking up.

• 彼かれはようやく口くちを開ひらいて、真しん実じつを話はなし始はじめた。

  He finally opened his mouth and began to tell the truth.

• 会かい議ぎ中ちゅう、誰だれも口くちを開ひらかなかった。

  During the meeting, nobody opened their mouth.