G4623

σιωπάω

siopao (see-o-pah'-o) v.
1. to be dumb (but not also deaf)
2. (figuratively) to be calm (as quiet water)
{differs from G2974 which means both dumb and/or deaf}
[from siope (silence, i.e. a hush; properly, muteness, i.e. involuntary stillness, or inability to speak, and thus differing from G4602, which is rather a voluntary refusal or indisposition to speak, although the terms are often used synonymously)]
KJV: dumb, (hold) peace
Compare: G4602, G2974