Your eraser fell under the desk.
On the day I failed the exam, I dropped my teeth from exhaustion.
"What are you guys playing? Let me in!" "Really? We’re playing a game called Stair Fall where a stickman just keeps falling down the stairs." "Sounds fun!"
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 fall so the vocab verb version means to fall.
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:
If you start to fall down, what do you yell? "OHHHH (お)!"