usurious

/juːˈʒʊriəs/
adjective
  1. Relating to or involving extremely high or unfair interest rates on loans.
    • Many people consider payday loans to be usurious because of their exorbitant fees.
    • She refused to sign the contract because the interest rate was usurious.
    • The bank was accused of usurious lending practices that trapped borrowers in debt.