L'

anatocism

it is the calculation of interests whereby those accrued according to a certain periodicity create other interests, and are added to the capital lent in such a way as to contribute to accruing other interests in subsequent periods.

L'

usury

it is the crime committed by those who, exploiting another individual's need for money, grant a loan and ask for its repayment at an interest rate higher than that permitted by law.