Since this word is made up of a single kanji, it probably uses the kun'yomi reading. You did not learn this reading, so here's a mnemonic to help you:
The worst thing to see as a captive is a 鳥子 (とりこ), a bird child. Imagine seeing a baby bird held captive in a cage. So sad!
She writes on her blog everyday about techniques to captivate men.