名詞 pay off:

1. the final payment of a debt
   同義詞：payoff, final payment
2. payment made to a person in a position of trust to corrupt his judgment
   同義詞：bribe, payoff
3. the income or profit arising from such transactions as the sale of land or other property
   同義詞：return, issue, take, takings, proceeds, yield, payoff
4. a recompense for worthy acts or retribution for wrongdoing
   同義詞：wages, reward, payoff

動詞 pay off:

1. yield a profit or result
2. eliminate by paying off (debts)
   同義詞：liquidate
3. pay off (loans or promissory notes)
   同義詞：redeem
4. do or give something to somebody in return
   同義詞：pay, make up, compensate
5. pay someone with influence in order to receive a favor
   同義詞：buy off
6. take vengeance on or get even
   同義詞：pay back, get, fix

1. He has a huge overdraft to pay off.
   他有一大筆透支要償還。
2. It took them three years to pay off the debt.
   他們三年才還清欠債。
3. Most of the profits are swallowed up by the mortgage. Once we've got that paid off I'll feel we've turned the corner.
   房產抵押中耗盡了大部分利潤，一旦抵押款償清，我們就渡過了難關。