Batter down
Definition 1 of 1
Pro Tip 1/3Physical Force
The phrase often implies using physical strength or a tool to forcefully break something. 
During the riot, protestors tried to batter down the gate.
Pro Tip 2/3Persistent Effort
It suggests a repeated action, not just a single hit or push. 
The relentless waves eventually battered down the sea wall.
Pro Tip 3/3Metaphorical Use
Can be used metaphorically to mean overcoming challenges or opposition. 
She had to batter down many obstacles to achieve success.