'Silent' in the Bible

And he says to them, Is it lawful on the sabbath to do good or to do evil, to save life or to kill? But they were silent.

And they remained silent, for by the way they had been reasoning with one another who was greatest.

And many rebuked him, that he might be silent; but he cried so much the more, Son of David, have mercy on me.

But he was silent, and answered nothing. Again the high priest asked him, and says to him, Thou art the Christ, the Son of the Blessed?