Repay (verb)

1. To give money back in return for something received, especially a debt or loan.
2. To make return or repayment to someone or something for a service, favor, or kindness.
3. To make amends for a wrong or harm done to someone.

Origin:

The word 'repay' comes from the old french word 'repayer' meaning 'to pay back', which comes from the latin word 're-' meaning 'back' and 'pactum' meaning 'agreement, treaty'. the verb 'repay' was first used in the 15th century.

Examples:

1. She promised to repay the money she borrowed from her friend next week.
2. After receiving a scholarship, he felt the need to repay the generosity of the organization.
3. He wanted to repay his debt to society by volunteering at a homeless shelter.
4. They thought the company should repay the workers for the overtime they worked last year.
5. She repaid her debt to her mentor by becoming a successful scientist and inspiring others.