from siope (silence, i.e. a hush, properly, muteness, i.e. involuntary stillness, or inability to speak, and thus differing from 4602, which is rather a voluntary refusal or indisposition to speak, although the terms are often used synonymously);
AV - hold (one's) peace 9, peace 1, dumb 1; 11
1) to be silent, hold one's peace
1a) used of one's silence because dumb
2) metaph. of a calm, quiet sea