Since this word is made up of a single kanji, it should use the kun'yomi reading. When learning the kanji, you didn't learn that reading, so here's a mnemonic to help you with this word:
You can't find your tag anywhere. It was just there, you swear, but now it's nowhere to be found. You search for it everywhere, then you realize... it was right there all along. Seriously? You're such a fool, duh (ふだ)!
Please put this amulet on the inside of your front door.
You should be careful not to show your hand.
Jello is really disgusting. There should be a picture of a skull and crossbones on the label.