重おもい口くちを開ひらく

expression, godan verb (-ku)

speak reluctantly; open one's heavy mouth

Used when someone finally speaks after hesitation, often about a difficult or unpleasant topic. The image is of a mouth that feels heavy and hard to open.

• 彼かれはしばらく黙だまっていたが、ようやく重おもい口くちを開ひらいた。

  He was silent for a while, but finally opened his heavy mouth and spoke.

• 母はははなかなか重おもい口くちを開ひらかず、何なにか言いいたそうにしていた。

  My mother didn't open her heavy mouth for a long time, looking like she wanted to say something.