1、silent的副词形式是silently。

　　2、意思：默默地、不说话地、悄悄地、静静地、无声地、不用言语表达地。

　　3、例句：She crept silently out of the room.她悄悄溜出房间。

　　4、例句：He silently agreed with much of what she had said.对于她所讲的，有很多他暗自赞同。