to deliberately destroy a building or wall
to hit someone with a vehicle so that they are injured or killed
to persuade someone to reduce the price of something
to reduce a price or amount
to show that something such as an idea or suggestion is not good or useful
I managed to knock him down to £120.
I will knock down the taxes that we over-pay, the taxes that we then have no say over how they're spent.
It was a theory that was easily knocked down.
Sue was knocked down just yards from her home.
The far wall could be knocked down to make the room bigger.
They knocked the price of beer down over 20p a pint to £1.45.
`Oh, well in that case let's just knock down all the prisons.
knocks down
knocking down
knocked down
There is no origin for this phrasal verb
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