This word uses the kun'yomi reading, which you haven't learned yet, but never fear! A mnemonic is here:
Something is coming toward your face. It's black and spiky and it's definitely going to hit you right in the eye. It's an uni (う). Have you ever seen one of those things before? You definitely aren't going to be happy with whoever is trying to hit you with an uni.
Cabrera hit a home run.
My teacher is the world's fastest keyboard typer.
My mom went crazy and pounded my butt with a carrot.