usuriously

/juːˈʒʊriəsli/
adverb
  1. In a way that involves extremely high or unfair interest rates.
    • He charged interest usuriously, demanding repayment far beyond the original amount.
    • The contract was written to allow the lender to profit usuriously from any late payment.
    • The company was accused of lending money usuriously to vulnerable customers.
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