knock down

to reduce the price of something.

• Could you knock down the price if I buy two?
• Could you knock down the price a couple of dollars?

to make someone or something fall by hitting.

• Tom knocked him down.
• Tom knocked Mary down.
• He was knocked down by a truck.
• I saw a man knocked down by a car.
• I saw a boy knocked down by a car.
• His grand-mother knocked him down.
• I saw the man knocked down by a car.
• She was almost knocked down by a car.
• The poor boy was knocked down by a car.
• Dan knocked down Matt with a kick in the face.
• Have you ever knocked down a dog with your car?
• Crossing the street, he was knocked down by a car.
• The delinquents knocked him down and stole his wallet.
• The gang knocked him down and robbed him of his watch.
• Dan swerved off the road to avoid knocking down a dog.
• I saw the man knocked down and the driver driving away.
• This is the first time I've ever knocked a dog down with my car.
• The boxer said he would knock down his opponent in the first round.
• It seems that the door was knocked down.
• They're going to knock down that monument.
• The thief knocked down the jewelry store's door and looted it.