knock down

Short definition from Wiktionary

Verb

1. 1
   To hit or collide with: To hit or knock (something or someone), intentionally or accidentally, so that it falls.
2. 2
   To hit or collide with: To demolish.
3. 3
   To hit or collide with: To reduce the price of.
4. 4
   To hit or collide with: To disassemble for shipment.
5. 5
   To acquire money, especially illicitly: To accumulate money, usually through crime.
6. 6
   To acquire money, especially illicitly: To embezzle.
7. 7
   To drink or party: To drink fast.
8. 8
   To drink or party: To spend extravagantly for a celebration.
9. 9
   To choose, declare or approve: To approve a drinking toast by banging glasses on the table.
10. 10
    To choose, declare or approve: To nominate (someone) to speak.
11. 11
    To choose, declare or approve: To introduce (someone) to another, especially to a woman.
12. 12
    To choose, declare or approve: To reject or override a decision.
13. 13
    To choose, declare or approve: To sentence (someone) to prison or other sentence.
14. 14
    To choose, declare or approve: At an auction, to declare (something) sold with a blow from the gavel.
15. 15
    To choose, declare or approve: To sell.
16. 16
    To send a stop signal to ensure a train is signalled to stop at the correct point.
17. 17
    To reduce the burning of (a fire), as by cooling it with water or dirt.