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If you return to the hometown you are going to return to one's hometown.
The reading for 帰 is the on'yomi reading, which you haven't learned. Just think about how when you return to your hometown, you're going to need a key (き) to get into your old home, which you haven't been to in a long time.
ほとんどの博打打ちが思っているように、彼女も自分には天分があると思っていたんだが、結局あるポーカーのゲームで全財産を失って、帰郷するはめになったんだ。
Like most gamblers, she believed she had talent, but in the end she lost everything to a poker game and had to go back to her hometown.
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