hold (one's) peace
To stay quiet despite wanting to say something. Just hold your peace if you don't have anything constructive to add. I knew that anything I said would just make her angry, so I decided to hold my peace.
hold one's peace
to remain silent. Bill was unable to hold his peace any longer. "Don't do it!" he cried. Quiet, John. Hold your peace for a little while longer.
hold one's peace
see under hold one's tongue.
hold your peace
remain silent about something.ˌhold your ˈpeace/ˈtongue
(old-fashioned) say nothing; remain silent although you would like to give your opinion: We don’t want anyone to know what’s happened, so you’d better hold your tongue — do you understand?I didn’t want to start another argument, so I held my peace.