This word uses the kun'yomi of the kanji, and you haven't learned that yet, so here's a mnemonic to help you:
You bump into someone or other, and just as you're wondering what on earth her name is, her nanny gashes (なにがし) her on the leg. It looks like it hurts. Poor you-know-who, whatever her name is. The nanny looks horrified, and is trying to patch her up.
This is the story of Yamada someone or other.
Wasn't it a guy named Suzuki something?
I heard you-know-who from that drama troupe has done it again.