knock down

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• verb transitive To hit or knock (something), intentionally or accidentally, so that it falls
• verb transitive To demolish.
• verb transitive At an auction, to declare (something) sold with a blow from the gavel.
• verb transitive, informal To reduce the price of.
• verb To drink fast
• verb transitive, usually passive To disassemble for shipment.