1. I am working hard to pay back the money I owe.
我正努力还清欠的钱。

2. She is finally paying back her parents for their support.
她终于在回报父母对她的支持。

3. They are paying back their enemies in kind.
他们正在以同样的方式报复敌人。

A: When are you planning on paying back the money?
A：你打算什么时候还钱？

B: I will pay it back by the end of this month.
B：我会在这个月底前还清。

1) 偿还（债务、金钱等）

2) 报复，进行反击

3) 回报（恩情、帮助等）

1. 偿还，还钱

e.g.
She is paying back her student loans.
她正在偿还助学贷款。

2. 报复

e.g.
He was paying them back for the insult.
他正在为那次侮辱进行报复。

phrase

1. To return money that is owed, or to retaliate against someone for something they have done.

Synonym: repay, retaliate