Strong's #4601: sigao (pronounced see-gah'-o)
 from 4602; to keep silent (transitively or intransitively):--keep close (secret, silence), hold peace.
Thayer's Greek Lexicon:
 ́ 
 
  sigaō 
 
 1) to keep silence, hold one' s peace
 2) to be kept in silence, be concealed
 
  Part of Speech: verb
Relation: from G4602
 
Usage:
This word is used 9 times:
Luke 9:36: "alone. And they  kept it close, and told no man in"
Luke 20:26: "at his answer,  and held their peace."
Acts 12:17: "unto them with the hand  to hold their peace, declared unto them how the"
Acts 15:12: "all the multitude  kept silence, and gave audience to Barnabas and"
Acts 15:13: "And after they  had held their peace, James answered, saying, Men and brethren,"
Romans 16:25: "according to the revelation of the mystery,  which was kept secret since the world began,"
1 Corinthians 14:28: "there be no interpreter,  let him keep silence in the church; and let him speak"
1 Corinthians 14:30: "that sitteth by, let the first  hold his peace."
1 Corinthians 14:34: "Let your women  keep silence in the churches: for it is not"