Who knocked over the perforated ladle?
I'm gonna bring him down, so don't worry too much.
My dad and I knocked down some trees and chopped them up for logs this Sunday.
This word consists of kanji with hiragana attached. Because the hiragana ends with an う sound, you know this word is a verb. The kanji itself means overthrow or collapse. This is when you are doing those things to something else. If you do, you're going to knock over whatever it is you're trying to knock over.
Since this word consists of a kanji with hiragana attached, you can bet that it will use the kun'yomi reading. You didn't learn that reading with this kanji, so here's a mnemonic to help you: You use the power of the Tao (たお) to do all of your knocking down. Imagine yourself contemplating Tao philosophy, then using those pleasant thoughts to knock everything over around you. BLAM!