needlessly

• 无须等待。

  There's no need to wait.

• 无须留在那儿。

  There's no need to stay there.

• 无须归还。

  There's no need to return it.

• 无须忧虑。

  There's no need to worry.

• 无须治疗

  not need treatment

• 这无须多说。

  Say no more.