상환하다(sang-hwan-ha-da, sanghwanhada)
Actively repaying a debt or money
When to use
Debtor repaying debt, Bank requesting repayment from customer, Repayment terms in contract
The nuance
Use when the subject actively repays the debt. It is an active verb where the subject performs the repayment.
상환되다(sang-hwan-doe-da, sanghwandoeda)
Debt or money being repaid passively or as a completed state
When to use
Debt repaid automatically, Describing repayment completion, Reporting that repayment occurred
The nuance
Use to indicate the state or result of debt being repaid. It is passive; the subject is the object of repayment.