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!
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.