usurious

Relating to or involving excessively high interest rates on loans.

• usury/ˈjuːʒəri/(n)高利贷
• usurer/ˈjuːʒərə/(n)高利贷者

• usurious rates
• usurious lending
• usurious interest
• usurious practices

1. 1.The payday lender was charging usurious interest rates of 400% per year. (exploitatively high)
2. 2.Laws against usury protect borrowers from predatory lending. (noun: excessive interest)

• exorbitant/ɪɡˈzɔːbɪtənt/— unreasonably high
• extortionate/ɪkˈstɔːʃənət/— unfairly high, exploitative
• predatory/ˈprɛdətəri/— exploiting the vulnerable

from Latin "usura" = interest on a loan — "uti" = to use — charging for the use of money