Verb siōpaō (to be silent) in the Gospels-Acts

(Translation from NRSV with a few modifications for a more literal meaning)

Matthew

20: 31The crowd sternly ordered them to be silent (siōpaō); but they shouted even more loudly, "Have mercy on us, Lord, Son of David!"
26: 63But Jesus was silent (siōpaō). Then the high priest said to him, "I put you under oath before the living God, tell us if you are the Messiah, the Son of God."

Mark

3: 4Then he said to them, "Is it lawful to do good or to do harm on the sabbath, to save life or to kill?" But they were silent (siōpaō).
4: 39He woke up and rebuked the wind, and said to the sea, "Be silent (siōpaō)! Be still!" Then the wind ceased, and there was a dead calm.
9: 34But they were silent (siōpaō), for on the way they had argued with one another who was the greatest.
10: 48Many sternly ordered him to be quiet (siōpaō), but he cried out even more loudly, "Son of David, have mercy on me!"
14: 61But he was silent (siōpaō) and did not answer. Again the high priest asked him, "Are you the Messiah, the Son of the Blessed One?"

Luke

1: 20But now, because you did not believe my words, which will be fulfilled in their time, you will be silent (siōpaō), unable to speak, until the day these things occur."
19: 40He answered, "I tell you, if these were silent (siōpaō), the stones would shout out."

Acts

18: 9One night the Lord said to Paul in a vision, "Do not be afraid, but speak and do not be silent (siōpaō);