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 defeat, so this means to be defeated, but also to be unsuccessful.

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 have been defeated. You lay there on the ground, and the fans around the stadium are disgusted with your performance. Some hipster walks up to you and says: "Yah, Boo" (やぶ) referring to how poorly you did. "No boo!", you reply back. "Yah boo", they say again.