knock away(redirected from knock it away)
1. To continue striking (something) sharply and swiftly. The man knocked away, but no one stirred inside the house. I was kept awake by the sound of a tree branch knocking away at my bedroom window.
2. To cause someone or something to move swiftly away (from someone, something, or oneself) with a sharp strike or collision. In this usage, a noun or pronoun can be used between "knock" and "away." The police officer knocked away the gun before the criminal could reach it. The force of the impact knocked me away from the control panel.
knock away (at something)
to continue to knock at something. The loose shutter kept knocking away at the side of the house. It knocked away all night, keeping me awake.