Phrasal Verbs
to persuade someone to reduce the price of something I managed to knock him down to $400.
to hit someone and make them fall to the ground She was knocked down by a bus. He knocked his opponent down three times in the first round.
to destroy a building by breaking its walls synonym demolish These old houses are going to be knocked down.
to reduce the price of something He knocked down the price from $80 to $50. see knock-down